Azden WR-22 Pro Series Discrete 2-Channel Stereo VHF Wireless Receiver Wireless 2-channel VHF receiver for recording audio during weddings and other video events Receives discrete wireless audio signals from 2 separate microphones at once Transmits via 169.445 and 170.245 MHz VHF frequencies; uses 9-volt battery Compatible with all Azden Pro series wireless mics; LED on/off and channel indicators Onboard controls for monitoring audio signals; 5.5 by 0.94 by 3 inches (W x H x D)