Lightweight and unobtrusive design. Weights only 1.73 oz. Reinforced cord is built to withstand the contact center environment and is protected against office chair wheels, sharp objects and daily use. Boom arm can be rotated 360 degrees with zero risk of breaking. Adjustable headband and microphone boom arm. Control unit lets you change volume, mute your calls, and more. PeakStop technology removes sudden loud sounds or tones before they reach your ears: Any sound above 118db is filtered out. Specially designed "air shock" noise cancelling mic filters out sharp breathing sounds and popping noises often heard in conversations. HD voice technology makes sure you clearly understand the other person. Sold by each. Black.