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.FeaturesOptima HD voiceFull duplex technologyMuting the microphone with touchpad10-foot (3-meter) 360° voice pickupDistance between CP960 and CPW90: 20 meters800mAh battery capacity19-hour talking time11-day standby timeDECTFrequency bands: 1880 – 1900 MHzDECT Standards: CAT-iq2.0Physical featuresMicrophone (W*D*H): 85.98mm*85.98mm*16.35mmCharge Cradle (W*D*H): 190mm*86mm*25.5mmOperating humidity: 10~90%Storage temperature: 0~40°C (+32~...