The Sennheiser SC 660 ANC USB is a wired binaural UC headset with active noise cancellation and proximity sensor technology. It has an outstanding sound for calling and comfortable to wear. It is designed for long day use. Buy now from The Telecom Shop PTY Ltd today and get fast delivery! https://www.thetelecomshop.com/au/sennheiser-sc-660-anc-usb-wired-binaural-uc-headset-with-active-noise-cancellation-and-proximity-sensor-508311