SG-107 Profession DV Stereo microphone fits for home-used DV. It is delicate and light 2 built-in cartridges which are vertical to each other. The MS stereo system enables a natural sound pick-up. And it is with low voltage alarm indication wide frequency high sensitivity and strong direction long distance sound pick up natural clear and sweet. Specification: Model: MS (Mid-Side) Stereo System Length of cable: About 28cm Power requirement: 1632 type 3V button lithium battery (Please use it in the room temperature). It can last for about 100hs. Dimension: 25.8mm x 72.5mm x 60mm (Not including cable and windscreen) Weight: 45g (not include the battery) Mode of sound pick-up: 90° or 120° two kinds for you switch. Frequency response: 30Hz-18000Hz Sensitivity: -40dB Direction: Unidirectional Output impedance: 200Ω S/N Ratio: 76dB (1KHz at 1Pa) Max SPL: 120dB