TM-480 5W 16CH 16 Channels UHF Interphone Walkie Talkie Two Way Radio With FM Radio Alarm Frequency Range VHF 136-174 UHF 400-470 Number of Channels 16 Standard Battery 1300 mA lithium battery Compatible with Li-ion and Ni-MH battery Electricity use of time (5-5-90 duty cycle) about 9 hours