1. New and high quality2. 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 clarity3. The pick up pattern(affecting the soundstage width)can be set to 90 or 120 according to the sound source4. The microphone can work for more then 800 hours when you install the CR2 3V Li battery in the package.(The actual hour depends on the varied case)Frequency response:30-18000HzSensitivity:-40dB(0dB=1v/pA AT 1KHz)Direction:Uni-directionOutput Impedance:200S/N Ratio:76dB(1 KHz at 1Pa)Max SPL,120dB(at 1 KHz 1% T.H.D)Power Requirement:DC 3VModel:MS(Mid-Side)Stereo SystemPower requirement:1632 DC 3V/125mA Button Li battery(please use it in the room temperature),it can last for about 100 hours.(with the DC 3V/125mA 1632 Button Li battery)Mode of sound pick-up:90° or 120°,2 kinds for your switchLength of cable:About 11.02 inch / 28cmSize:72.5mm x 25.8mm x 60mm (L x W x H)Package size:8.07 x 4.92 x 1.57 inch / 20.5 x 12.5 x 4cm(L x W x H)Weight:45g(no include battery weight)