The AVG CBL201B Double Element, Low-Profile Boundary Layer Microphone from AKG is an easy to install microphone with intuitive user controls for talk and mute, design aesthetics with LEDs, and screw terminals for easy installations. The cardioid microphone is powered by 24 to 48V phantom power and can be used to capture audio in conference rooms, education spaces, and meeting rooms. in addition, it is designed to avoid RF interference from mobile phones and laptops. The CBL20B1 Double Element, Low-Profile Boundary Layer Microphone is easy to install, easy to use, easy on the eyes, and makes meetings sound great.