Cardioid Condenser Boundary Microphone with 5-Pin XLR Output and Remote Muting. This phantom-powered cardioid condenser boundary microphone features a 5-pin XLR output connector with a touch-sensitive capacitive-type user switch for enhanced control in conference and boardroom installations. Not only can the switch be configured to toggle between mute and live audio, but, with the microphone's external contact closure, it can also be set up to trigger an external device, such as a camera or the room's lighting.