Headmic with cardioid capsule to use with wireless systems. Sennheiser ME 3-II Headset Microphone Features: Cardioid polar pattern provides excellent ambient-noise and feedback rejection Adjustable headband is comfortable and stays in place during vigorous performances Excellent ambient-noise and feedback rejection 150dB SPL rating easily handles loud stage situations Connector: Evolution wireless mini-pin Tech Specs Microphone Type: Pre-polarized condenser Compatibility: Sennheiser EW D1 wireless systems Connector: 1/8 #34; Locking Mini-Jack Connector Polar Pattern: Cardioid Max SPL: 150dB SPL Color: Black