The durable Bogen SCU250 Boundary Microphone E/CARDIOID is an unobtrusive, unidirectional, surface-mount microphone ideal for meeting rooms, conferences, and stage productions where minimum visibility is ideal. The SCU250 provides full, rich reproduction of voice and music and is well-suited in capturing the sound source and the immediate surroundings. It has a low sensitivity to stage vibration and thumping noise and has excellent user sound isolation feedback rejection. The SCU250 has a low-impedance balanced output. The SCU250 features a heavy copper case with a non-glare matte black finish, mounting keyways on the bottom for hanging or for attachment to the mounting surface,and a cardioid pickup pattern. The microphone requires an external 9V - 52V DC phantom power supply and is terminated by a standard male XLR with a built-in pre-amplifier.