... 1,output power 5w 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 ... current≤100mASilent waiting20mAPictures: Two Way Radio intercom interphone TR-900