The tri-element motorized ceiling microphone with three cardioid polar patterns covering 360° for Boardrooms, conferencing, court rooms and other venues. The master and slave units are identical in construction. Two rotary 0-9 digital decimal encoders are used to set Master (00) and 01-99 determines slave designation. The factory default is set to Master (00). The ceiling mounted retractable triple back electret condenser microphones designed for suspended ceiling applications.