Optimal HD Voice Full-Duplex technology 20-feet (6-meter) 360° voice pickup Capacitive mute touchpad WiFi Technology (WPA2/AES128 Encryption) Expansion Mic (Works with built-in mic) Yealink VCM36-WWireless Microphone for Video Conferencing System6-Meter 360° Voice Pickup Clearly Capture Every CornerWith its built-in 3-microphone array and Yealink self-developed algorithm, VCM36-W features a 20ft (6m) and 360° voice pickup range, perfectly capturing every voice in medium and large meeting spaces. Moreover, with the Yealink Noise Proof Technology, VCM36-W filters out environmental noise within 90 decibels, delivering crystal-clear audio performance.Explore Wireless Technology - Embrace Workspace FlexibilityEnjoying the wireless transmission design of VCM36-W, users just need to pair the microphone with the meeting room devices once to start. No more concern about connecting the cables or how different units cascade together. Users can wirelessly connect microphones according to the speci