The DMR858M is a 5W digital two-way radio application module developed by NiceRF based on the DMR818S-5W digital radio module. Its core module, the DMR818S-5W, features a stamp hole design and offers advantages such as compact size, 5W output power, easy integration, and compatibility with mainstream analog radios, making it well-suited for integration into various terminal devices.

The DMR818S-5W module supports the DMR Tier II standard and integrates the Moto AMBE++ vocoder, delivering clear and natural voice quality across various communication scenarios. This module is highly integrated, incorporating a microcontroller, digital radio chip, RF power amplifier, and audio amplifier—all key components—into a compact design. Users only need to connect a power supply and speaker to quickly build a portable digital radio system with 16 configurable channels.

What’s New in the Next-Generation 5W Digital/Analog Radio Module?
Compared to the previous generation 5W digital radio application module, the DMR858M has undergone significant improvements in structural design and integration level. The most notable enhancement lies in its improved ease of use and reduced overall size. By re-architecting the hardware layout, DMR858M consolidates multiple essential circuits—previously distributed across separate function boards—into a single main control board, achieving a true “single-board integration” design. This optimization not only simplifies wiring and installation for end users but also significantly reduces the space required, making the module better suited for lightweight and compact device integration.

While maintaining the original communication performance and reliability, the DMR858M continues to feature the high-performance AMBE++ vocoder, supports the DMR Tier II protocol, and remains compatible with traditional analog radio systems—ensuring customers enjoy a stable, high-quality voice communication experience.

Features of DMR Walkie Talkie Module DMR858M

· UHF band frequency: 400~470 MHz
VHF band frequency: 134~174 MHz
350 band frequency: 320~400 MHz

· Distance up to 7-8Km

· power output:5W, low power:2W

· High Sensitivity: -120dBm

· Bit error rate down to 5% under -117dB

· Analog Bandwidth: 12.5 / 25 KHz    Digital Bandwidth:6.25KHz

· Message transmission and reception

· DMR(Digital Mobile Radio)/ Analog walkie talki

· Built-in standard DMR protocol

· Supports SMS sending function

· Supports low power sleep mode

· Dual time-slot walkie-talkie, repeater compatible

· Tail sound elimination automatically

· Highly integrated, cost-effective

· Compact design, easy to embed

Applications of DMR Walkie Talkie Module DMR858M

· DMR walkie talkie module

· Invisible intercom system

· Building security system

· Audio surveillance system

DMR Mode of DMR Walkie Talkie Module DMR858M

· Message transmission and reception.

· Enhanced encryption of Voice and Text message.

· Various voice call types: All call, Group call and Private call;

· Reminder for input calling, calling status checking

· Emergency alarm and radio monitor;

· Repeater

Application