Yealink Cpw90 - Wireless Expansion Mic for Cp960

Yealink CPW90 - WOptima HD voice Full duplex technology Muting the microphone with touchpad 10-foot (3-meter) 360° voice pickup Distance between CP960 and CPW90: 20 meters 800mAh battery capacity 19-hour talking time 11-day standby time 2 x CP Wireless Expansion Microphone Charger Cradleireless Expansion Mic for CP960