SA818S and SA818 are both walkie talkie modules launched by NiceRF.
SA818S is an upgraded version of SA818. Using Renesas MCU, SA818S has LNA added to further improve the reception sensitivity, as well as additional function of reading configuration parameters.
| Product model | Walkie talkie module SA818S、SA818 |
| Product features | High integration and small size |
| Adopted 1ppm TCXO crystal oscillator, with stable performance | |
| Built in EEPROM, data is saved in power failure | |
| High and low power options (500mW / 1W) | |
| Independent transmiting and receiving frequency | |
| RSSI signal strength indication | |
| Level 38 CTCSS analog sub audio code | |
| Level 8 squelch | |
| Level 8 adjustable volume | |
| Level 166 normal phase and inverse CDCSS digital sub audio | |
| Operating voltage range | 3.3~5.5 V |
| Bandwidth | 12.5KHz |
| High receiving sensitivity | -124dBm |
| Open transmission distance | 4~5 kilometer |
| Operating temperature range | -40~80℃ |
| Sleep current | ≤1uA |
| Receiving current | 60mA |
| Transmiting current (high power) | 650~750mA |
| Transmiting current (low power) | 450~550mA |
| Transmiting power (high power) | 28~31dBm @VCC=4.0V |
| Transmiting power (low power) | 25~27dBm @VCC=4.0V |
| Modulation sensitivity | 10mV @1.5KHz/2.5KHz frequency deviation |
| Audio modulation distortion | 2~5% @1.5KHz/2.5KHz frequency deviation |
| Signal to noise ratio | 38~45dB @1.5Khz/2.5KHz frequency deviation |
| Adjacent channel power | -60dBc @12.5K offset |
| CTCSS modulation frequency shift | 0.35~0.75KHz |
| Received signal-to-noise ratio | 45~50dB |
| Audio output amplitude | 100-1000mV |
| Audio output impedance | 200 OHm |
| Size (length * width * height) | 35.6*19*3.2mm |
| Application area | Small walkie talkie system, building community, security system, outdoor sports products, audio monitoring system. |
| Product model | Walkie talkie module SA818S | Walkie talkie module SA818 |
| Operating frequency band | UHF band frequency：400~480 MHz VHF band frequency：134~174 MHz 350 band frequency：320~400MHz | UHF band frequency：400~480 MHz VHF band frequency：134~174 MHz |
| LNA circuit | Yes | No |
| Read parameter command | Yes | No |
That’s all about the differences between walkie talkie module SA818S and SA818 and hope it’s helpful.
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FAQ for walkie talkie module SA818
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