Ultra-small VHF / UHF FM professional handheld walkie-talkie Frequency :136-174, 400-430440-480 MHz Channel: 16 DTMF decoder for the election call, auto-transpond Priority scan, and multi-channel transpond Built-in voice control VOX hands-free calls can be launched Operation There are two programmable function keys, voice finishing function 500mW audio output, resonant sound clear Up to 14 hours of work time Handheld walkie-talkie with the U.S. military standard MIL-STD810, the European standard tests, such as IP54 and IP55 Walkie-talkie size (high-x x D): 54 x 122 x 33 mm (with the KNB-29N walkie-talkie batteries) 1-1 Weight: about 360 g.