Peltor’s self-contained, intrinsically safe PowerComPLUS I.S. two-way radio headset is specifically designed for hazardous environments requiring explosion-proof radio transmitters. The headset comes with 22 pre-programmed UHF channels and 38 sub-channel privacy tones and can transmit up to two kilometers. Either Voice Activated Transmitting (VOX) or Push-To-Talk (PTT) button can be used. Aearo/Peltor, Indianapolis, IN.