CC550 Binaural Headset w/ Noise Cancelling Microphone, Extra-large Ear Caps. Features extra-large, padded ear caps to block out a maximum of noise and substantially improve concentration and comfort. Ultra Noise Canceling blocks out a maximum of ambient noise, making your voice easier to understand. Ideal for extended periods of heavy-duty use in very high noise-level, open-plan offices and contact centers. Powerful, precise speech reproduction Fully adjustable, durable design for all day comfort Extra-large ear caps and ultra noise cancelling microphone Can directly connect to all major phone systems (cable required)General Description: Over the head, binaural headset with extra-large ear caps supplied with ultra noise cancelling microphone and Sennheiser"s exclusive ActiveGard(tm) protection technology. The CC 550 is a top-of-the-line binaural headset and offers powerful, precise sound to both ears for optimal understanding. Its durable construction makes it perfect for any type of office or professional communication. ActiveGardTM safeguards the user from the effects of an acoustic burst Independent double-sided headband adjustment and self-adjusting ball-mounted speaker capsules allow perfect fitting to the head 300° adjustable microphone boom allows microphone to be positioned exactly for optimal speech clarity. Teflon®* washer support increases positioning accuracy, stability and ensure optimal durability. Unique comfort pads in the headband and specially padded ea