Shure MXA920AL-R Ceiling Array Microphone (Aluminum)Automatic Coverage technology requires no setup yet gives you precise control of audio capture if desired. With next generation array architecture for enhanced directional pickup and more natural speech, the MXA920 ceiling array microphone is easy to use and quick to deploy for AV conferencing, camera tracking, voice lift, or sound reinforcement. Features For Meetings, Conferences, Presentations Covers 30 x 30' Area, Requires No Setup Automatic and