HOMEABOUT USPRODUCT INFORMATION DMR VS SA SERIES WALKIE-TALKIE MODULE SELECTION GU...

DMR vs SA Series Walkie-Talkie Module Selection Guide | 2025 Wireless Communication Applications and Comparative Analysis

03

Nov . 2025

By sdga:

Are you struggling to choose between DMR digital walkie-talkie modules and SA series analog walkie-talkie modules? In the IoT era, wireless walkie-talkies remain an indispensable core tool across industries—from outdoor construction and industrial sites to security patrols and emergency rescue. "Walkie-talkie modules" are the key components that truly power these applications behind the scenes.

We at G-NiceRF have focused on the wireless communication module field for over fourteen years, accumulating rich industry experience. DMR digital walkie-talkie modules and SA series analog walkie-talkie modules are our two most mature product lines. Over these years, we've collaborated with system integrators from different industries on hundreds of projects. Many requirements seem complex, but they can actually be implemented quickly because we have ready-made experience and solutions.

From our experience, whether a project can proceed smoothly is often determined from the "module selection" stage. We often say: choose the right module, and the project is already half successful.

This guide provides in-depth analysis of the core differences, parameter performance, and industry application scenarios between DMR digital and SA analog walkie-talkie modules, with detailed selection comparison tables and FAQs to help readers make informed choices between "analog and digital communication."

If you have any questions during the selection process or need recommendations for your specific application scenario, please contact us. Contact us now!

DMR and SA Series Walkie Talkie Usage and Selection Guide

How Have Walkie-Talkie Modules Evolved? From Analog to Digital

Before looking at specific models, let's clarify the communication principles and technical routes: what's the difference between analog and digital walkie-talkies? They represent different stages in wireless communication development, each with its own applicable space.

1. Analog Walkie-Talkies: Mature Technology, Widely Applied

Analog walkie-talkies represent an earlier applied communication technology. This technology is widely used in scenarios such as property management, factory workshops, and security patrols.

Characteristics of analog walkie-talkies:

  • Plug and Play: Ready to use upon power-up, no complex setup required

  • Zero Latency: End-to-end delay is nearly zero, voice transmission without interruption

  • Cost-Effective: Particularly suitable for budget-sensitive projects or scenarios requiring compatibility with large amounts of existing equipment

  • Mature Applications: In traditional security, property management, retail stores, and factory workshops, analog walkie-talkies can still meet daily communication needs


Factory Scheduling, Security Monitoring, etc.

2. Working Principle of Analog Walkie-Talkies

In multiple project practices, the analog technology commonly used in walkie-talkie applications typically transmits voice signals by loading them directly onto RF carriers through Frequency Modulation (FM) or Amplitude Modulation (AM). This architecture is simple with low hardware costs, and through long-term market validation, it has stable performance in both reliability and compatibility.

In many industries emphasizing cost-effectiveness, real-time voice communication, and rapid deployment, our analog walkie-talkie modules (such as G-NiceRF's SA series) are still widely adopted with clear application value.

Of course, when using analog communication, we also encounter some inherent technical limitations:

  • Significant Signal Attenuation: Once communication distance extends, voice quality gradually degrades, with background noise and distortion becoming noticeable

  • Limited Anti-Interference Capability: In areas with complex electromagnetic environments or heavy building obstruction, communication effectiveness is easily affected

  • Low Spectrum Efficiency: Limited number of users that can be supported on the same frequency band

  • Weak Encryption and Privacy Protection: Easily monitored or intercepted, unsuitable for scenarios with high confidentiality requirements

3. Digital Walkie-Talkie Technology: Innovation in Efficiency and Security

The digital walkie-talkie technology adopted by G-NiceRF, especially DMR (Digital Mobile Radio), has become an important direction for communication system upgrades. DMR is an open digital mobile radio standard developed by ETSI (European Telecommunications Standards Institute), with core objectives of achieving efficient, low-cost digital voice and data communication.

In actual projects, DMR demonstrates the following advantages:

  • Voice Quality: DMR adopts advanced narrowband vocoder technology (such as AMBE++), maintaining clear, background-noise-free call quality even at the edge of signal coverage. Even when signal strength decreases, digital technology can ensure voice integrity through error correction algorithms.

  • Spectrum Efficiency: DMR adopts TDMA (Time Division Multiple Access) technology, supporting two independent time slots on a single 12.5kHz channel, directly doubling communication capacity on the same frequency band. This means DMR's channel capacity is twice that of traditional analog systems under the same frequency resources.

  • Data Functionality: Besides voice calls, we often use DMR's data extension capabilities in projects, such as short messages, GPS positioning, telemetry and remote control functions, which are very practical for industry dispatch and equipment management.

  • Security: Digital signals themselves are not easily monitored by traditional scanning equipment. DMR supports encryption functions. When handling industry projects with security requirements, we prioritize enabling this feature to effectively prevent communication content leakage.

Frequency Band Selection

Whether analog or digital walkie-talkie modules, they typically offer two options: UHF (Ultra High Frequency 400-470MHz) and VHF (Very High Frequency 134-174MHz):

  1. UHF Band: Stronger penetration, suitable for use in urban dense building or indoor environments

  2. VHF Band: Better diffraction capability, typically achieving longer communication distances in open areas or outdoor environments

The choice depends on your specific application environment.

Specific Selection and Comparison

1. SA Series Analog Walkie-Talkie Modules: Synonymous with High Cost-Effectiveness and Reliability

For many applications emphasizing cost and communication stability, G-NiceRF's SA series analog walkie-talkie modules are the preferred solution. This series features mature technology, simple interfaces, and flexible deployment. This technology has been widely applied across industries and has been running stably with consistently good results.

1.1 SA818S-CE: UHF/VHF Certified Module for EU Market

SA818S-CE is an upgraded model launched based on the popular SA818S module, specifically for European market entry requirements. This module has passed CE-RED certification, providing compliance assurance for products exported to Europe.

Beyond certification advantages, SA818S has been significantly optimized in performance. The module specifically adds an LNA (Low Noise Amplifier) circuit, improving its receiving sensitivity by 4dBm compared to previous products, reaching -124dBm. This means that in weak signal environments, SA818S can capture more distant and weaker signals, effectively expanding communication coverage.

Power output fluctuation across the entire 400-470MHz band is controlled within 1dB, demonstrating RF consistency and stability. These characteristics make it the mainstream choice for embedded applications (such as high-end handheld devices, industrial wireless control) with dual high requirements for performance and compliance.

Core Parameters:

  • Transmit Power: 1W

  • Receiving Sensitivity: -124dBm

  • Communication Distance: 3-4 km (open field)

  • Frequency Band Support: UHF (400-480MHz) / VHF (134-174MHz)

  • Certification: CE-RED

  • Size: 35.6 x 19 mm

  • Core Advantages: CE certification, high sensitivity, small size, export to Europe

1.2 SA828: Fully Functional Miniature Walkie-Talkie Core

SA828 is a cost-effective walkie-talkie module integrating high-performance microcontroller, narrowband RF transceiver chip, and power amplifier.

Its core design philosophy is "reducing design complexity". Developers only need to connect simple power supply, audio amplifier, and speaker to quickly build a fully functional 16-channel miniature walkie-talkie. All key parameters—frequency, CTCSS/CDCSS sub-tone, squelch (SQ) level, etc.—can be easily configured through PC software or serial commands, greatly reducing development barriers and cycles.

SA828 provides up to 1W output power, ensuring reliable communication distance in various environments. Its ultra-small size (41.37mm × 28.22mm) allows it to be conveniently integrated into various handheld devices, security systems, or customized communication terminals.

Core Parameters:

  • Transmit Power: 1W

  • Receiving Sensitivity: -124dBm

  • Communication Distance: 3-4 km (open field)

  • Frequency Band Support: UHF / VHF

  • Size: 41.37 x 28.22 mm

  • Core Advantages: High cost-effectiveness, full functionality, tri-band support, general-purpose applications

1.3 SA858: 4W High Power, Ultra-Long Distance, High Sensitivity

SA858 is the 4W high-power version in G-NiceRF's SA series, with communication distance reaching 7-10 km (open field). It is the highest power and longest distance analog walkie-talkie module in the SA series. This module has built-in powerful RF circuits, DSP, digital interfaces, and audio amplifiers, supporting UART command control and PC software configuration, particularly suitable for professional walkie-talkie applications requiring ultra-long distance communication.

Core Parameters:

  • Transmit Power: 4W

  • Receiving Sensitivity: -124dBm

  • Communication Distance: 7-10 km (open field)

  • Frequency Band Support: UHF / VHF

  • Audio Output: 2W @ 8Ω

  • Integration Level: Fully integrated application module

  • Core Advantages: 4W high power, 7-10 km, high sensitivity, professional walkie-talkie

SA858 is particularly suitable for the following scenarios requiring ultra-long distance communication:

  • Large-Scale Campus Communication: Large industrial parks, logistics parks (7-10 km coverage) / Ports, airports, mining areas for long-distance dispatch / Large farms, forest areas for wide-area communication

  • Professional Walkie-Talkie Systems: Professional handheld walkie-talkie development / Vehicle-mounted walkie-talkie systems / Fixed base station and mobile terminal communication

  • Emergency Rescue and Security: Large-scale emergency communication networks / Border defense, coastal patrol communication / Forest fire prevention, flood control command

  • Outdoor Adventure and Event Support: Long-distance self-driving convoy communication / Large outdoor events (off-road, marathons) / Mountain climbing, hiking expedition teams

  • Public Utilities: Power inspection, transmission line maintenance / Water facilities, reservoir dam inspection / Highway, railway line communication

1.4 SA868S: Mid-Range Choice with Power Upgrade

SA868S is the 2W power version in the SA series. While maintaining the same size and interface as SA828, the transmit power is increased to 2W, with communication distance improved by approximately 30% compared to the 1W version, reaching 4-5 km (open field).

This module is particularly suitable for the following scenarios:

  • Projects requiring longer communication distance than SA818S but not needing DMR digital functionality

  • Medium-scale industrial parks, logistics warehousing, construction site communication systems

  • Cost-sensitive projects requiring 2W power for volume deployment

  • Upgrading existing SA828 solutions while maintaining same size and interface, only increasing power

  • Domestic market or cost-sensitive projects not requiring certification

SA868S achieves a good balance among power, cost, and performance, making it an ideal choice between SA818S and high-power modules.

Core Parameters:

  • Transmit Power: 2W

  • Receiving Sensitivity: -124dBm

  • Communication Distance: 4-5 km (open field)

  • Frequency Band Support: UHF / VHF

  • Size: 41.37 x 28.22 mm (consistent with SA828)

  • Core Advantages: 2W power, distance upgrade, cost-effective, power balance

2. SA Series Key Parameter Comparison

To help you understand the differences between these modules more intuitively, here is a comparison table for common questions:

Parameter

SA818S

SA868S

SA828

SA858

Transmit Power

1W

2W

1.5W

4W

Receiving Sensitivity

-124dBm

-124dBm

-124dBm

-124dBm

Communication Distance

3-4 km

4-5 km

3-4 km

7-10 km

Frequency Band Support

UHF / VHF

UHF / VHF

UHF / VHF

UHF / VHF

Vocoder

None (Analog)

None (Analog)

None (Analog)

None (Analog)

Integration Level

Core Module

Core Module

Core Module

Fully Integrated Application Module

LNA Circuit

Yes

No

No

Yes

Certification

CE-RED

None

None

None

Size

35.6 x 19 mm

41.37 x 28.22 mm

41.37 x 28.22 mm

Approx. 45 x 30 mm

Operating Voltage

3.3-5.5V

3.3-5.5V

3.3-5.5V

3.3-9V

Transmit Current (High Power)

≤500mA @ 5V

≤1.5A @ 5V

≤1A @ 5V

1.4-1.5A @ 8V

Audio Output Power

-

-

-

2W

Audio Output Impedance

-

-

-

Channel Count

16

16

16

16

Bandwidth

12.5/25KHz

12.5/25KHz

12.5/25KHz

12.5/25KHz

Core Advantages

CE certification/High sensitivity/Small size/Export to Europe

2W power/Distance upgrade/Cost-effective/Power balance

High cost-effectiveness/Full functionality/Tri-band support/General-purpose applications

4W high power/7-10 km/High sensitivity/Professional walkie-talkie

From the above comparison:

  • SA828: With its higher power and cost-effectiveness, it becomes the main choice for general-purpose projects

  • SA818S: With its certification advantages, higher receiving sensitivity, and more compact size, it is more suitable for professional-grade and export-oriented products with higher requirements for performance and compliance

  • SA868S: General-purpose projects, high cost-effectiveness

  • SA858: Ultra-long distance communication, large-scale coverage projects, professional walkie-talkie systems

DMR Series Digital Walkie-Talkie Modules: Suitable for Digital Communication Architecture Upgrades

When communication needs are no longer just "able to communicate" but pursue higher voice clarity, stronger confidentiality capabilities, and support for data services, we prioritize recommending our DMR digital walkie-talkie modules. These modules have demonstrated forward-thinking and scalability in many industry projects.

Our DMR series strictly complies with ETSI DMR Tier II standards, with complete and clear voice and data architecture, covering common frequency bands and providing multiple power configurations, capable of long-term stable operation in various professional communication systems. 

1. DMR Series Digital Walkie-Talkie Module Key Parameter Comparison

Parameter

DMR818S

DMR828S

DMR858S

DMR858M

Transmit Power

2W

2W (High) / 0.5W (Low)

5W (High) / 1W (Low)

5W (High) / 2W (Low)

Receiving Sensitivity (Analog)

-124dBm

-120dBm

-120dBm

-120dBm

Receiving Sensitivity (DMR)

-117dBm

-117dBm

-117dBm

-117dBm

Communication Distance

4-5 km

4-5 km

6-8 km

6-8 km

Frequency Band Support

UHF / VHF / 350

UHF / VHF / 350

UHF / VHF / 350

UHF / VHF / 350

Vocoder

Moto AMBE++

Moto AMBE++

Moto AMBE++

Moto AMBE++

Integration Level

Core Module (Requires Peripheral Circuits)

Application Module (Plug and Play)

Application Module (Plug and Play)

Application Module (Plug and Play)

Predefined Channels

Requires Self-Configuration

16

16

16

Certification

FCC+CE

None

None

None

Operating Voltage

3.3-4.5V

3.3-4.5V

3.6-8.4V

3.7-8.5V

Receiving Current

<135mA

<165mA

170mA

<165mA

Sleep Current

55uA

<1mA

1mA

<0.1mA

Audio Impedance

-

UART Baud Rate

-

57600bps

57600bps

57600bps

Core Advantages

Dual certification global market/Data transmission

2W analog-digital integrated/Plug and play/Cost-effective

5W analog-digital integrated/Plug and play/High power

5W high power analog-digital integrated/Ultra-low power consumption

1.1 DMR818S: Professional-Grade DMR Core with Dual Certification

In international fire communication projects, customers typically require modules to meet both FCC ID and CE-RED dual certification standards. The DMR818S module is designed precisely for such needs. This 2W digital walkie-talkie module performs stably during integration verification. Because it has passed ETSI DMR Tier II protocol testing, it requires almost no additional adaptation during integration.

DMR818S belongs to G-NiceRF's core DMR series, commonly seen in vehicle-mounted stations, handheld terminals, emergency communication equipment, and industry walkie-talkie systems. The module internally integrates high-performance MCU, dedicated DMR RF chip, and power amplification circuit, equipped with AMBE++ vocoder. When we conducted voice tests in construction sites and factory environments, even with background noise exceeding 85dB, voice remained clear without "intermittent" or "burr" sounds.

If you're developing terminal products for the global market (especially requiring both FCC/CE compliance), this model is relatively hassle-free, eliminating the need to find additional certification channels, and can cover most project requirements.

  • Digital/Analog Dual-Mode Support Unlike traditional analog modules, DMR818S supports both analog and digital mode operation with smooth switching. The advantages of this architecture include:
    1. Smooth transition to digital communication networks
    2. Support for hybrid deployment and phased upgradesReduced system transformation costs

  • Protocol and Functional Features Core DMR functions supported by the module include:
    1. Private call, group call, all call
    2. Emergency alarm
    3. Short message sending
    4. Over-the-air identity recognition and management
    5. Time slot management (TDMA dual time slot)

Based on these capabilities, DMR818S is suitable for industry fields with requirements for communication organization, reliability, and dispatch management, including but not limited to:

  • Public safety and private network communication

  • Industrial parks and manufacturing

  • Urban management and sanitation systems

  • Logistics transportation and fleet dispatch

  • Exhibition events and security collaboration

1.2 DMR828S: 2W Analog-Digital Integrated, Cost-Effective Solution

DMR828S is a 2W DMR Tier II professional walkie-talkie module, analog-digital integrated, plug and play. I've seen this module deployed in large quantities in projects that are cost-sensitive but require digital functionality, with excellent results.

Core Features:

  • 2W Power Output: High power 2W / Low power 0.5W selectable

  • Analog-Digital Integration: Compatible with analog walkie-talkies, supports DMR Tier II digital walkie-talkie

  • Tri-Band Support: UHF (400-470MHz) / VHF (134-174MHz) / 350 (320-400MHz)

  • Dual Time Slot TDMA: One channel can run two logical channels, doubling spectrum efficiency

  • Integrated Moto AMBE++ Vocoder: High-quality digital voice encoding and decoding

  • 16 Predefined Channels: Ready to use out of the box, no complex configuration required

  • Fully Integrated Design: Built-in MCU, DMR codec, RF/audio amplifier, PTT, microphone, 16-channel switch, volume control

  • Plug and Play: Only requires connecting power and speaker to work

  • Ultra-Low Sleep Current: < 1mA, suitable for battery-powered applications

  • Dedicated Heat Dissipation Design: Ensures long-term call stability

DMR Mode Functions

  • SMS sending function (supports transparent transmission and SMS applications)

  • Voice encryption function

  • SMS encryption function

  • Call and called party prompts

Particularly suitable for the following scenarios:

  • Medium-scale industrial parks: 4-5 km coverage with digital capability

  • Cost-sensitive digital upgrade projects: Need DMR functionality but not high power

  • Analog-digital hybrid deployment: Gradual migration from analog to digital

  • Battery-powered applications: Low sleep current extends battery life

  • Tri-band applications: Projects requiring UHF/VHF/350 flexibility

1.3 DMR858S: 5W High Power, Ultra-Long Distance, Professional-Grade

DMR858S is a 5W DMR Tier II professional walkie-talkie module, providing maximum power and longest distance in the DMR series. We've collaborated with customers to deploy this module in large industrial environments, and its communication reliability is impeccable.

Core Features:

  • 5W High Power Output: High power 5W / Low power 1W selectable

  • Ultra-Long Communication Distance: Open field up to 6-8 km

  • Analog-Digital Integration: Compatible with analog walkie-talkies, supports DMR Tier II digital walkie-talkie

  • Tri-Band Support: UHF (400-470MHz) / VHF (134-174MHz) / 350 (320-400MHz)

  • Dual Time Slot TDMA: One channel can run two logical channels, doubling spectrum efficiency

  • Integrated Moto AMBE++ Vocoder: High-quality digital voice encoding and decoding

  • 16 Predefined Channels: Ready to use out of the box, no complex configuration required

  • Fully Integrated Design: Built-in MCU, DMR codec, RF/audio amplifier, PTT, microphone, 16-channel switch, volume control

  • Plug and Play: Only requires connecting power and speaker to work

  • Wide Voltage Range: 3.6-8.4V, supports multiple battery configurations

  • Dedicated Heat Dissipation Design: Ensures long-term call stability under high power

DMR Mode Functions:

  • SMS sending function (supports transparent transmission and SMS applications)

  • Voice encryption function

  • SMS encryption function

  • Call and called party prompts

Particularly suitable for the following scenarios:

  • Large industrial parks and ports: 6-8 km coverage, digital encryption

  • Mining and quarry operations: Long-distance communication in complex environments

  • Emergency response networks: Maximum distance and digital security features

  • Large construction sites: Comprehensive coverage of vast areas

  • Professional walkie-talkie development: High-power digital walkie-talkie products

  • Critical infrastructure: Power plants, water facilities, transportation hubs

1.4 DMR858M: 5W High Power, Analog-Digital Integrated, Plug and Play

DMR858M has the following unique advantages:

  • 5W High Power Output: High power 5W / Low power 2W selectable

  • Analog-Digital Integration: Compatible with analog walkie-talkies, supports DMR Tier II digital walkie-talkie

  • Tri-Band Support: UHF (400-470MHz) / VHF (134-174MHz) / 350 (320-400MHz)

  • Dual Time Slot TDMA: One channel can run two logical channels, doubling spectrum efficiency

  • Integrated Moto AMBE++ Vocoder: High-quality digital voice encoding and decoding

  • 16 Predefined Channels: Ready to use out of the box, no complex configuration required

  • Fully Integrated Design: Built-in MCU, digital walkie-talkie chip, RF power amplifier, audio amplifier

  • Plug and Play: Only requires connecting power and speaker to work

  • Ultra-Low Sleep Current: < 0.1mA, suitable for battery-powered applications

  • RoHS & Reach Compliant: Lead-free process production

2. Core Advantages of DMR Digital Communication

When choosing DMR series digital walkie-talkie modules, you gain not only an upgrade in voice communication capabilities but also a comprehensive improvement in system performance, reliability, and scalability.

Compared with analog communication, DMR has the following key advantages:

  • Stable and Clear Audio Performance Analog communication experiences voice distortion as channels attenuate in noisy environments or coverage edge areas. DMR adopts digital error correction technology, effectively suppressing noise interference and maintaining call quality consistency.

  • Higher Spectrum Utilization Efficiency DMR adopts Time Division Multiple Access (TDMA) mechanism, running two logical channels within one 12.5kHz channel, equivalent to doubling capacity without increasing frequency occupation, suitable for systems with tight frequency points or large user volumes.

  • Support for Voice + Data Multiplexing Capability Through serial port control, DMR modules can achieve the following extended functions:

    1. Short message sending and receiving
    2. GPS data backhaul
    3. Remote activation/deactivation (Kill/Revive)
    4. Dispatch and control command delivery
    These features enable deep integration with IoT/M2M systems.

  • Higher Communication Security Digital walkie-talkies have inherent anti-monitoring characteristics. The DMR protocol itself also supports multiple encryption mechanisms, meeting confidential communication needs in government, enterprise, industrial, and commercial scenarios.

SA Series vs DMR Series: How to Quickly Select?

Different communication systems have different design objectives. Clarifying requirements first, then determining the series, is the key first step in selection.

Step 1: Confirm Communication Mode—Analog or Digital?

This is the core dividing point. The following comparison can help you quickly judge:

If more suitable for analog modules (SA series), typically meeting the following conditions:

  • Limited project budget, emphasizing cost-effectiveness and deployment costs

  • Only basic voice call functionality needed

  • Low confidentiality requirements

  • Existing network is analog system, no short-term upgrade plans

If more suitable for digital modules (DMR series), recommended to meet the following needs:

  • Need higher voice clarity, especially in noisy or long-distance scenarios

  • Large number of users, limited frequency point resources

  • Communication involves not only voice but also data, positioning, SMS, or control commands

  • Scenario has communication security requirements, needs encryption protection

  • System planning has upgrade or hybrid deployment needs

Step 2: How to quickly select the right module?

1. Selection Reference by Industry Application

Industry Sector

Core Challenges

G-NiceRF Solutions and Core Functions

Business Value

Emergency Rescue and Public Safety

Communication network interruption, difficult command and dispatch, high safety risks for rescue personnel.

DMR818S / DMR858M builds independent emergency communication network. Core functions: 5W power, digital encryption, one-key alarm, GPS data backhaul; DMR858M provides plug-and-play solution for rapid deployment.

Achieve safe, confidential command and dispatch, improve on-site response speed and personnel safety.

Industrial Manufacturing and Smart Warehousing

Strong electromagnetic interference, clear communication in high-noise environments; production data and voice dispatch systems are disconnected.

DMR818S / SA828 / SA868S / SA858 embedded in industrial terminals. Core functions: Anti-interference capability, DMR supports data transmission, integrated PLC/SCADA; SA858 provides 4W power, covering large parks.

Improve team collaboration efficiency, ensure production safety, connect voice and data flow, provide communication foundation for Industry 4.0.

Construction and Property Management

Reinforced concrete structure causes severe signal shielding; complex multi-department, multi-role collaborative management.

SA828 / SA868S / SA858 (UHF) ensures signal penetration, DMR system provides refined management. Core functions: Strong penetration, private call/group call, short message commands; SA858 provides ultra-long coverage, suitable for super-large construction sites.

Improve coverage continuity, optimize multi-team collaborative workflows, improve management efficiency and service quality.

Large-Scale Campus Communication

Coverage requirement 7-10 km, need ultra-long distance communication, budget allows.

SA858 / DMR858M provides high-power long-distance solution. Core functions: SA858 provides 4W analog walkie-talkie, 7-10 km distance; DMR858M provides 5W digital walkie-talkie, analog-digital integration.

Meet super-large-scale coverage needs for large industrial parks, ports, airports, mining areas, providing professional-grade communication quality.

Medium-Scale Campus Communication

Coverage requirement 3-4 km, limited budget, no need for complex digital functions.

SA868S provides cost-effective 2W power solution. Core functions: 2W transmit power, 3-4 km communication distance, UART serial control, same size as SA828 for easy upgrade.

Balance power, cost, and performance, meeting medium-scale project needs such as logistics parks, medium-sized factories, commercial real estate.

Outdoor Adventure and Event Support

Remote areas without cellular network coverage, equipment needs long battery life, lightweight, requires long-distance communication.

SA818S / SA858 integrated into portable devices. Core functions: SA818S provides -124dBm high sensitivity, low power consumption, compact size; SA858 provides 4W power, 7-10 km ultra-long distance.

Provide reliable inter-team communication in complex environments, improve activity safety, ensure smooth organizational coordination.

Smart Agriculture and Environmental Monitoring

Large-scale, distributed data collection and remote device control needs, covering vast farmland and forest areas.

DMR series modules / SA858 integrated into sensors and controllers. Core functions: DMR provides stable data transmission, supports remote command control; SA858 provides ultra-long distance voice dispatch, covering large farms and forest areas.

Achieve precision agriculture and automated environmental monitoring, reduce labor costs, improve resource utilization efficiency and output.

Professional Walkie-Talkie Development

Need to quickly launch professional walkie-talkie products, shorten development cycle, reduce development costs.

DMR858M / SA858 provides plug-and-play solution. Core functions: DMR858M provides 5W analog-digital integration, 16 predefined channels, plug and play; SA858 provides 4W analog walkie-talkie, 2W audio output.

Significantly shorten product development cycle, reduce development costs, quickly bring products to market, seize business opportunities.

2. Complete Product Selection Recommendation Table

Application Scenario

Recommended Product

Selection Reason

Emergency rescue, public safety (export)

DMR818S

Need digital encryption, GPS data, one-key alarm, FCC+CE dual certification

Emergency rescue, public safety (domestic)

DMR858M

5W high power, analog-digital integration, plug and play, rapid deployment

Industry 4.0, data collection

DMR818S

Need voice + data dual functions, integrated PLC/SCADA systems

Large industrial parks, ports, mining areas (analog)

SA858

4W power, 7-10 km ultra-long distance, high sensitivity

Large industrial parks, ports, mining areas (digital)

DMR858M

5W power, analog-digital integration, tri-band support

Large construction sites, commercial complexes

SA868S / SA858

SA868S provides 4-5 km coverage; SA858 provides 7-10 km ultra-long coverage

Medium warehousing, logistics parks

SA868S

Power and cost balance, meeting medium-scale project needs

Small factories, economical projects

SA828

1.5W power, high cost-effectiveness, full functionality

Export to Europe, high sensitivity requirements

SA818S

CE-RED certification, -124dBm high sensitivity, small size

Outdoor adventure, event support (long distance)

SA858

4W power, 7-10 km ultra-long distance

Outdoor adventure, event support (portable)

SA818S / SA868S

SA818S more compact and portable, SA868S provides longer distance

Large farms, forest areas (voice)

SA858

4W power, covering vast areas, low cost

Smart agriculture, environmental monitoring (data)

DMR818S / DMR858M

Support sensor data transmission and remote control

Professional walkie-talkie development (analog)

SA858

4W power, 2W audio output, professional-grade performance

Professional walkie-talkie development (digital)

DMR858M

5W power, analog-digital integration, plug and play, fast time to market

3. Power Gradient and Distance Comparison Table

Product Model

Transmit Power

Communication Distance (Open Field)

Applicable Scenarios

SA818S/SA828

1W

3-4 km

Standard distance, high cost-effectiveness, general-purpose

SA868S

2W

4-5 km

Medium distance, cost-effective, power upgrade

DMR818S

2W

4-5 km

Digital walkie-talkie, data transmission, dual certification

SA858

4W

7-10 km

Ultra-long distance, large-scale coverage, professional walkie-talkie

DMR858M

5W

6-8 km

High-power digital, analog-digital integration, plug and play

DMR858S

5W

6-8 km

Digital walkie-talkie, high power, needs to be paired with DMR818S


Real Application Cases: From Challenges to Quantifiable Results

G-NiceRF's walkie-talkie modules have been widely applied in various professional communication systems, becoming the core selection foundation for industry integrators, equipment manufacturers, and solution providers. Our products focus on communication pain points in actual application scenarios, support highly reliable deployment, and establish measurable business value among performance, cost, and scalability.

Industry Sector

Core Challenges

G-NiceRF Solutions and Core Functions

Business Value

Emergency Rescue and Public Safety

Communication network interruption, difficult command and dispatch, high safety risks for rescue personnel.

DMR818S builds independent emergency communication network. Core functions: 5W power, digital encryption, one-key alarm, GPS data backhaul.

Achieve safe, confidential command and dispatch, improve on-site response speed and personnel safety.

Industrial Manufacturing and Smart Warehousing

Strong electromagnetic interference, clear communication in high-noise environments; production data and voice dispatch systems are disconnected.

DMR818S / SA828 embedded in industrial terminals. Core functions: Anti-interference capability, DMR supports data transmission, integrated PLC/SCADA.

Improve team collaboration efficiency, ensure production safety, connect voice and data flow, provide communication foundation for Industry 4.0.

Construction and Property Management

Reinforced concrete structure causes severe signal shielding; complex multi-department, multi-role collaborative management.

SA828 (UHF) ensures signal penetration, DMR system provides refined management. Core functions: Strong penetration, private call/group call, short message commands.

Improve coverage continuity, optimize multi-team collaborative workflows, improve management efficiency and service quality.

Outdoor Adventure and Event Support

Remote areas without cellular network coverage, equipment needs long battery life, lightweight.

SA818S integrated into portable devices. Core functions: -124dBm high sensitivity, low power consumption, compact size.

Provide reliable inter-team communication in complex environments, improve activity safety, ensure smooth organizational coordination.

Smart Agriculture and Environmental Monitoring

Large-scale, distributed data collection and remote device control needs.

DMR series modules integrated into sensors and controllers. Core functions: Stable data transmission, supports remote command control.

Achieve precision agriculture and automated environmental monitoring, reduce labor costs, improve resource utilization efficiency and output.

Large Construction Sites, Industrial Manufacturing and Smart Warehousing, Self-Driving Convoys, Marathon Events, Outdoor Adventure, Medium-Scale Campus Communication

Communication network interruption, difficult command and dispatch; strong electromagnetic interference, clear communication in high-noise environments; coverage requirement 3-4 km, limited budget, no need for complex digital functions.

SA868S provides cost-effective 2W power solution. Core functions: 2W transmit power, 4-5 km communication distance, UART serial control, same size as SA828 for easy upgrade.

Improve team collaboration efficiency, ensure production safety; balance power, cost, and performance, meeting medium-scale project needs such as logistics parks, medium-sized factories, commercial real estate, reducing total system cost.

Frequently Asked Questions (FAQ) - 2025 Edition

 Below are common questions users encounter when developing and using DMR and SA series modules. This article aims to provide selection and integration reference for developers.

Q1: The module has no response after power-up, and there is no return when sending commands through the serial port. What's the reason?

A: This is a very common initial setup issue. First, please carefully check whether your wiring is correct, especially VCC and GND. For DMR series modules, please ensure the CS pin (pin 13) is connected to high level; for SA series modules, the PD pin (pin 6) needs to be connected to high level. This is a necessary condition for the module to enter working mode. Please confirm whether the baud rate set by your serial port tool or microcontroller is consistent with the module's default 57600bps.

Q2: How to make the module communicate with walkie-talkies of other brands?

A: Interoperability is key. Please follow these steps:

  • Communicating with analog walkie-talkies: Switch your module (whether SA series or DMR series) to analog channel and ensure its frequency and CTCSS/CDCSS sub-tone are consistent with the other party's walkie-talkie settings.

  • Communicating with digital walkie-talkies: First confirm whether the other party is standard DMR Tier II system and uses AMBE++ vocoder. If protocols don't match, digital communication cannot be established. After confirming protocol match, please set the module's frequency, Color Code, and Time Slot consistent with the other party. If you can receive signals but have no sound, please check whether encryption settings and color codes of both parties match.

Q3 What is the actual communication range of the module? (2025 data)

A: Communication distance is affected by multiple factors, including power, antenna, terrain, and electromagnetic environment. In ideal open areas, you can generally refer to the following empirical values:

  • 1W power (such as SA818S): approximately 3-4 km

  • 2W power (such as SA868S): approximately 4-5 km

  • 2W power (such as DMR818S): approximately 4-5 km

  • 4W power (such as SA858): approximately 7-10 km

  • 5W power (such as DMR858S): can reach 5 km or more

In urban or obstructed environments, distance will be correspondingly shortened. To achieve optimal results, please use high-quality, correctly matched antennas and communicate from higher positions whenever possible.

Q4: Do DMR modules support encryption? How secure is the communication?

A: Yes, the DMR standard itself supports encryption functions, which can effectively prevent call content from being eavesdropped. G-NiceRF's DMR modules support encryption types defined in the DMR protocol. Although the module itself may not directly integrate hardware encryption algorithms such as AES128, users can implement custom software encryption schemes in upper-layer applications or protocols to achieve higher-level security protection.

Q5: How should I choose an appropriate power supply method for my project?

A: Power supply stability is crucial. Although low-power modules (such as 1W) can use USB power during debugging, we strongly recommend using independent external power supplies for formal applications and voice communication testing. Especially for high-power modules of 2W and above, instantaneous transmit current is large, and USB port power supply capability may be insufficient, easily causing abnormal module operation, restart, or damage. We recommend using regulated power supplies capable of providing 5V/2A or higher current capability.

Q6 : Does G-NiceRF provide module custom development services in 2025?

A: Yes, we support software and hardware ODM custom development. If you have special functional requirements, such as custom communication protocols, special interface definitions, or functional module optimization, our technical team can provide professional custom services to meet your diverse industry integration needs.

Technical Support and Future Outlook

Choosing G-NiceRF's walkie-talkie modules means you get not only the hardware itself but also one-stop technical support ready for development. We provide supporting materials for each model:

  • Datasheet

  • Hardware reference design

  • Command set and communication protocol documentation

  • Development manual and sample code

  • EMC/RF design guidance

If you encounter problems at any stage—product selection, schematic design, RF layout, debugging, software integration—our technical team can provide timely response and engineering-level support to help you effectively shorten development cycles and reduce integration costs.

Partnering with Next-Generation Communication Systems

As IoT, private network communication, and industry digitalization processes continue to accelerate, wireless modules are transforming from "functional components" to "system core capabilities." G-NiceRF will continue to deepen its expertise in RF communication, continuously launching intelligent, integrable, highly reliable series products around the following areas to meet industry needs for communication quality, security, and scalability, providing long-term support for project implementation and system upgrades:

  • DMR digital walkie-talkies

  • Analog voice private networks

  • Indoor and outdoor relay systems

  • Dispatch communication and remote control

  • IoT / M2M extended applications

Summary

In the phase where analog and digital communication coexist, choosing the appropriate walkie-talkie module helps projects proceed smoothly. G-NiceRF's SA series analog walkie-talkie modules, with their practicality and easy integration characteristics, are widely applied in basic voice communication scenarios. Among them, SA828 is suitable for projects with balanced cost and functionality requirements, while SA818S is more suitable for export and performance-demanding applications due to its CE certification and higher receiving sensitivity.

In digital communication, DMR series modules can be used for systems requiring voice quality improvement, protocol compatibility, or data extension. DMR818S has passed both FCC and CE certification, meeting entry conditions for North American and European markets, suitable for industry scenarios with clear requirements for communication standards, security, and system integration.

We hope this guide can provide reference for your selection process. If you're evaluating analog or digital communication solutions, or have specific needs regarding power, protocol, distance, certification, etc., G-NiceRF can provide corresponding modules and technical support.

Contact Us Now

If you have any questions during product selection or would like recommendations tailored to your specific application, please feel free to contact us.
Visit our official website to explore detailed product documentation, or reach out to our sales and technical teams for compatibility advice and integration solutions.

Reference Websites:

Product Selection-lora modules-UWB/audio/walkie talkie/lora wan mddules-NiceRF

https://www.aliexpress.com/store/1100701506

Contact Us

 +86-755-23080616

 sales@nicerf.com

Website: https://www.nicerf.com/

Address: 309-315, 3/F, Bldg A, Hongdu business building, Zone 43, Baoan Dist, Shenzhen, China

Contact us
Privacy Policy

Privacy Policy

· Privacy Policy

There is currently no content available


           

Email:sales@nicerf.com

Tel:+86-755-23080616

Address:309-315, 3/F, Bldg A, Hongdu business building, Zone 43, Baoan Dist, Shenzhen, China


×