Shure MX690-L4 Wireless Boundary Microphone, 638-662 MHz Frequency Band, Cardioid Polar Pattern

The Shure MX690-L4 Boundary Microphone (638-662 MHz Frequency Band) features a built-in wireless transmitter that is compatible with Shure's SLX UHF series wireless microphone receivers. The boundary microphone features a cardioid polar pattern for sufficient noise suppression and optimum pick-up of conversations, speech, interviews, etc. The internal wireless transmitter eliminates the need to run cable and drill holes. A programmable Mute switch includes push-to-talk and push-to-mute modes. Bi-color LED provides status information and the MX690 is conveniently powered on two AA alkaline batteries.