iShoot Professional DC/DV Video Camera Camcorder Stereo Microphone MIC Shoe Mount for Canon Nikon Sony a7 High Directivity Pickup type: Stereo electret capacitance x 2,Frequency response: 50Hz-16KHz Sensitivity:-45dB,Enhance: +10 dB,SNR: 76dB,Maximum load SPL: 120dB Low-cut frequency: 60Hz 10dB (otc),Output impedance: 500 (AT 1KHz) Battery type: AA battery,Cable length: 33cm;Dimensions (excluding sponge): 200 x 42 x 65mm,Weight: about 120g Use scope by hot shoe directly: Canon EOS 5D Mark III/5D Mark II/7D/6D, 70D/60D/700D/650D/600D/100D, EOS-M; Nikon D4/D4S, D3S/D800/D800E/D610/D600, D7100/D7000/D5300/D5200/D5100/D3300/D3200; Sony a7s/a7r/a7, a99/a77II/a65/a58/a57/a37,a5000/a3000, RX1