The Kenwood KHS-10BH Noise-Reduction Headset is an over the head style headband and has heavy-duty noise-reduction of up to 24 db. The noise-cancelling feature is built into the boom microphone's line and aids in blocking unnecessary and unwanted background noises from being transmitted. This KHS10BH headset features Push-To-Talk (PTT) which makes communication easier with all compatible ProTalk TK series 2-way radios. The KHS-10 series is a professional grade dual ear headset that is perfect for racing intercom, avionics and industrial use. Audio is heard over loud dual-muff earphones and the noise-canceling dynamic boom microphone ensures clear audio on transmit. A must have for loud work areas.