Noise-canceling microphone. Comes with an in-line control unit that provides access to commonly used functions like volume and mute, as well as the ability to end and answer calls. Otimized for Microsoft Lync, providing instant "Plug & Play" installation for your headset. It uses digital signal processing (DSP) to digitally optimize the user's voice and suppress echoes. Foam ear cushion. Wideband Hi-Fi frequency response range. USB connectivity. Sold by each. Black.