Technical data sheet for the SR-FRS-1W VHF wireless intercom and data transmission module by Sunrise Electronics.
The SR-FRS-1W (VHF) module provides wireless voice intercom and data transmission functions in the 136‑174 MHz band. It integrates a high‑performance RF transceiver, microcontroller and power amplifier, and can be controlled via a standard RS‑232 asynchronous serial interface using AT commands.
The module supports two power levels (0.5 W low, 1 W high), multiple data modes (short message, DTMF), and offers extensive configuration options such as CTCSS/CDCSS, VOX, and adjustable audio levels. It is suited for portable intercom systems, wireless data links, and embedded voice functions in other products. This manual is written in Chinese.
| Frequency range | 136‑174 MHz |
|---|---|
| RF output power | High 1 W, Low 0.5 W |
| Supply voltage | 3.3‑5.0 V |
| Sleep mode current | 0.1 µA |
The module is configured via a standard asynchronous serial (RS‑232) interface using AT commands.
Two power levels are available: high power at 1 W and low power at 0.5 W.
The module consumes only 0.1 µA in ultra‑low‑power sleep mode.