Design: Double ear-cup (dual muff) with a comfort headband and impact-resistant polymer shell. Audio: Crystal clear, high-diameter speakers and a noise-canceling boom microphone. Controls: Features a large, easy-to-use PTT button (with a spring-loaded clip) for use with gloved hands, as well as Voice Operated Transmit (VOX) capability. Compatibility: Made for the Entel DX and DN series portable two-way radios