The Kenwood KHS-10-OH 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. Kenwood USA is a leading developer and manufacturer of consumer electronics and communications equipment. Founded in the United States in 1961, Kenwood USA is the largest sales subsidiary of Kenwood Corporation of Japan and is recognized by consumers and industry professionals for providing products known for quality, performance, and value.