... 2,2200mA li-ion battery 3,16channels 4,speech security function 5,compatible li-ion and NI-MH battery Two Way Radio intercom ... interphone TR-900 1,output power 5w2,2200mA li-ion battery 3, ... 16channels4,speech security function5,compatible li-ion and NI-MH battery Audio companding to provide clearer voiceRadiogram FunctionAlarm FunctionSpeech security ...