The Azden "Red" Series of infrared wireless microphones is the solution for classrooms, auditoriums, churches, conference/meeting rooms, and health clubs, and where ever security is an issue. The two-channel IRR-30 receiver allows the use of two mics at the same time. Each channel has its own frequency and every IRR-30 uses the same two frequencies.
The receiver's built-in sensor array allows complete freedom of movement in a 1600-sq.ft. room. For larger rooms, up to three wall/ceiling mountable external sensors (IRD-30 or IRD-60) increase the working distance. If the receiver is mounted in a secured cabinet the third sensor input disables and replaces the receiver's internal sensor.