Yealink CPE90 Two Wired Microphones For CP960, CP Wired Expansion Mic CPE90, Works as an Audio Input Device for Yealink CP960 Conference Phone.The Yealink CPE90 is a CP Wired Expansion Mic which works as an audio input device for Yealink CP960 conference phone. Up to two expansion microphones can be connected to Yealink CP960 IP conference phone, which extend the range by an additional 10ft 360 respectively. Advanced echo cancellation and noise suppression filter out unwanted sound, so all that remains is crystal clear voice. The CPE90 is a clear cut choice for organizations which enables