The Yealink CPW90 is a CP Wireless Expansion Mic which works as an audio input device for Yealink CP960 conference phone. It features superior audio technology and supports 360-degree voice pickup range at a radius of up to 10 feet (3 meters) without any wiring troubles. Capacitive mute touchpad plus place-and-charge charger cradle round out its user-friendly features, making Yealink CP Phone Wireless Expansion Mic CPW90 ease of use and being an ideal choice for organizations who need optimal microphone placement and wider room coverage