The Beyerdynamic Classis BM 34 Boundary Microphone is a low-profile, flush-mount microphone with a half-cardioid polar pattern and a wide frequency response. The Classis BM 34 is an excellent choice for video/teleconferencing applications, capturing discussions and other applications where a high-quality boundary microphone is needed. Its half-cardioid polar pattern increases gain-before-feedback while minimizing ambiance. The Elastic bearing rings (included) further minimizes mechanical and surface born noise, making it ideal for mounting on ceilings, desktops and more. The microphone is phantom powered with 8 - 52V and features a 3-pin XLR connection.