Features: The microphone can be fixed on the DV through the microphone hole and path. The MS stereo system can achieve natural sound pickup. Provides stereo images with excellent clarity. The pickup mode (affecting the width of the sound field) can be set to 90 or 120 according to the sound. 3.5mm MIC socket and 1/4" standard hot shoe. With windshield and 3V CR2 battery. Suitable for Canon Suitable for Nikon Suitable for Pentax Olympus is suitable for Panasonic digital SLR cameras. Specifications: frequency response: 30-15000 Hz; sensitivity: -40 dB (0dB = 1 V/Pa at 1 KHZ); type: MS (middle side) stereo line; cable length : About 11.02 inches / 28 cm; Power supply: 1* 3V CR2 battery (included); Battery life: about 800 hours; Item size: 13 * 6 * 2cm / 5.1 * 2.3 * 0.7in; Item weight: 47g / 1.6oz ; Packing size: 18 * 8.5 * 3.5cm / 7 * 3.3 * 1.3in; Packing weight: 100 g/3.56 ounces; Packing list: 1 * microphone; 1 * windshield; 1 * 3V CR2 battery; Note: If this If the microphone is connected to your DSLR, the LED indicator will remain dim during recording. If the indicator keeps flashing, it means that the battery is too weak.