The Sennheiser CC 520 Headset with Noise-Canceling Microphone offers powerful, precise sound to both ears for optimal understanding. Its robust construction makes it ideal for any type of office or professional communication, and its 300-degree adjustable boom allows the mic to be positioned wherever you need it. The noise cancelling microphone headset is where comfort meets practicality. It features Teflon washer support that increases the position accuracy, stability and durability and has padded ear cups for outstanding comfort even during long periods of use. The pads also allow for a wonderful fit to the head. The Sennheiser CC 520 Headset with Noise-Canceling Microphone is made with high quality construction for premium performance and long-lasting use. They make an ideal addition to your audio accessories.