interphone,two ways radio,radio transceiver; 1.16 Channels; 2.5W; 3.Programming by PC. Interphone Xinchuang TR-900Special FeaturesAudio companding to provide clearer voiceRadiogram FunctionAlarm FunctionSpeech security FunctionWith more powerful penetration by virtue of high power outputVOX Function Unity SectionFrequency RangeV:136-174MHz U:400-420/419-430/450-470MHZRated VoltageDC7.4V(Li-ion ...