Features:The BOYA BY-VM01 mini microphone is designed for recording audio while making video.Fixing cushioned anti-vibration.Reduces vibration noise during auto focus.Windshield allows to reduce noise.Connect to the camera via the 3.5mm mini-plug.Built-in hot shoe mount with 1/4'' thread.The microphone base fits with almost camera camcorder.Power by one 1.5V AAA battery (not included).Specifications:Type: Condenser microphone (directional)Frequency Response: 38-20，000HzSensitivity: 40dB +/- 3dB / 0dB=1V/Pa， 1kHzSignal to Noise Ratio: 75dB or moreOutput Impedance: 1.0k Ohm or lessPower: 1.5V AAA battery (not included)Plug: mini-pin plug (3.5mm) Package size: 16.7 * 11.8 * 7cm / 6.6 * 4.6 * 2.8inPackage weight: 176g / 6.2ozPackage List:1 * Microphone 1 * Dead Kitten Windscreen1 * Wind Shield1 * Carrying Bag1 * User Manual (English)