Plantronics CS50-USB is a wireless headset system designed for use with softphones and deskphones, providing hands-free convenience and superior sound quality. It features a noise-canceling microphone for crystal-clear calls, a range of up to 200 feet from the PC, and a convertible design for over-the-head or over-the-ear wearing styles. The CS50-USB also boasts remote call detection and answer/end capability, making it easy to manage calls away from your desk.