... & clear voice -full duplex,digital& wireless -distance over 700m -unique technique wireless digital transceiverApplication scope 1,Working-yard ... site real-time communication.3,Secure communication, digital wireless FM Duplex intercom4,Industrial wireless meter reading5 ... 3. Use adaptive frequency hopping, AHF, With the channel change mechanism4. Transmit Power: 19dBm, receiver sensitivity-105dBm5 ...