Features:The microphone can be fixed on the DV with microphone hole and path.The MS stereo system enables a natural sound pick-up.Delivering a stereo sound image with superb clarity.The pickup pattern (affecting the soundstage width) can be set to 90 or 120 according to the sound.3.5mm MIC socket and 1/4" standard hot shoe.With a windscreen and a 3V CR2 battery.For Canon for Nikon for Pentax for Olympus for Panasonic Digital SLR Camera.Specifications:Frequency Response: 30-15000 HzSensitivity: -40 dB (0dB = 1 V/Pa at 1 KHZ)Type: MS (Mid - Side) stereo wireLength of cable: About 11.02 inch / 28cm Power Supply: 1* 3V CR2 battery (included)Battery life: About 800 hoursItem Size: 13 * 6 * 2cm / 5.1 * 2.3 * 0.7inItem Weight: 47g / 1.6ozPackage Size: 18 * 8.5 * 3.5cm / 7 * 3.3 * 1.3inPackage Weight: 100g / 3.56ozPackage List:1 * Microphone1 * Windscreen1 * 3V CR2 batteryNote:If this microphone is connected with your D-SLR camera， the indicator LED will keep dark during recording. And if the indicator LED keep flash， it means the battery is too weak.