Functions: 1)Working frequency: 136-174MHz/400-440MHz/440-480MHz, 400-470MHz/440-490MHz are also available. 2)Unique design, light, attractive figure, easy to operate 3)Voice prompt channel Number. 4)In-built VOX function, hands-free talking 5)Prior scanning, in-time answer for multi-channel 6)In-built CTCSS / DQT function 7)Programming key to set, personalized function 8)500mW audio output 9)With 1500mAh Ni-MH battery, 14H for talking duration 10)Compatible with American Military Standard MIL-STD810C,D,E tests, Such as rain and water humidity, dust and vibration shock etc. and European Standard IP54 /IP55 tests.