WSN-03 High Power Long Distance Serial Port to Wireless Transmit/Receive ModuleFeatures:- Work frequency: 433/470/868/915MHz- GFSK adjust method, half-duplex communication, air receive/transmit transmission, connection, control- Receive sensitivity up to -120dBm, transmission distance 3500-4000m- Receive work current<30mA, sleep current <5uA- Auto complete communication protocol switch or FM TX/RX