Yealink (CM-MountKIT) Multipie Ceiling Mount Kits for CM20 Multipie Ceiling Mount Kits for CM20 • 1 x on ceiling mount kit • 1 x adjustable drop ceiling mount kit • 1 x suspension mount kit   Versatile Adaptability Yealink CM20 provides flexible deployment options for divers meeting room styles.   High Fidelity of Voice CM20 is equipped with 16 omnidirectional microphone units, providing unparalleled audio clarity across 8 independent pickup zones. It effectively covers up to a radius of 4m nominal coverage, with a high quality radius of 3m full-duplex audio capture, ideal for medium to large spaces. The EQ tuning of the CM20 is specifically tailored to accentuate the exceptional quality of human vocals.   You would just need to go into the RoomConnect on the MTR and turn on separate Microphone Mute Control then you can mute that microphone when not in use. Link on how to do this – https://support.yealink.com/en/portal/knowledge/show?id=6459d54c0a11b818a7542883