The Yealink CPW90 is a Dect Expansion Mic for the IP conference phone CP960. It consists of two wireless microphones, with a long-lasting battery, up to 19 hours of talk time and 11 days of standby time, which can be easily recharged by placing them on their base. It incorporates technologies that ensure clear and uninterrupted communication between participants in the teleconference, such as full duplex, HD Voice, and echo cancellation. It has the ability to connect to the CP960 up to a distance of 20 meters and provides additional coverage within a range of 3 meters and 360 degrees, making it an ideal solution for large conference rooms.