TechCare (TM) Professional Shotgun Camcorder , Camera Microphone for Nikon DSLR D600, D800, D3S, D300S, D7000, D5100, Canon EOS 60D, 6D, 7D, 5D Mark II, 650D, 5D MK III, Rebel T4i, T3i, T2i Professional Microphone with Wind Muff. Fuzzy wind muff goes over the standard wind muff.Specially designed for the camera and high-sensitivity condenser microphone to enhance the quality of the recording. 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.Heart-shaped single-point pickup features can effectively reduce the noise of the surrounding environment to be picked up. The pick up pattern(affecting the soundstage width)can be set to 90 or 120 according to the sound source. Shock-resistant structural design, to reduce the mechanical noise of the camera and other vibration noise. 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).10dB sensitivity enhancement and 200Hz low-frequency attenuation; to meet the different field Co-use. Use standard universal connector specifications, can be simply fixed the camera. Frequency response: 50Hz-16kHz./Sensitivity:-32dB  3dB (0dB = 1V/Pa at 1kHz). enhanced sensitivity: +10 dB./The low-frequency attenuation: 60Hz 10dB / octave. output impedance: 2000  30%./1.5V AA alkaline battery-powered, battery life of up to 100 hours.(Battery Included)