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1. Product Outline :

        The SR_FRS_1W  is a low cost but high performance integrated walkit talkie transceive / Data transfer module. With built-in high performance micro controller, narrow band rf transceiver and standard Uart interface,it can be easily used and succeed in all the walkie talkie function with good quality voice and long distance transmission. Users only need to connect external audio amplifiers, microphone or speaker with this module ,then it can work as a small walkie talkie with 0.5W output ,KDS 1PPM TCXO. In open area, it can come to performance of 5Km communication. Simplified interface and ultra small size make this module into a wide range of applications, also can conveniently embed into various handheld devices,to improve the comprehensive performance of end products.

        Besides the  excellent voice intercom, The more important feature is this module hase the data/SMS transfer ability;  up to 100 byte can be sent at one time;  it  is compliance  with the standard UART transfer protocol;
       The SR_FRS_1W(UHF) and SR_FRS_1W(VHF) are compatible pin to pin, The only difference is thire frequency.

2. Product performance
 FM demodulation technique Based on digital signal processing technology；
 Frequency Range：

                SR_FRS_1W (VHF)136～174MHZ;

                 SR_FRS_1W (UHF)400M～480MHZ；
 Frequency step：5K/6.25K/12.5K/25K；
 RF Output Power： 1W
 voice encryption (scrambling): 8 types.
 Voice Compression- Expansion ；
 SMS Receive /Transformer，The wireless Baut : 1200；
 CTCSS（38 group）+ CDCSS（83 group） ；
 Automatic elimination tail ；
 Volume adjustable（1-9）；
 Vox level adjustable（0-8）；
 SQ level adjustable（0-9）；
 MIC sencitivity level adjustable（1-8）
 The ultra low power dispattion in Sleep Mode（0.1uA）;
 Power supply ：DC 3.3～5.0V
  Communication distance：more than 5 KM in open field.
3.Applications：
 portable intercom and paging systems；
 wireless data transmission；
 mobile phones and other embedded in radio functions product 。