Polaroid Professional Grade Digital SLR and Camcorder Microphone Electret Condenser Technology: Sensitive To Low Volume Sources Slide Shoe Mounting With Wheel Lock  Lithium Battery Provides Longer Use Cardioid Pickup Pattern Diminishes Sound From Behind User Selectable Pickup Angles Choose Either 90 Degree or 120 Degree Battery Level Monitor  Windscreen Included; Great Indoors And Out  Lightweight