XM-40 Condenser Shotgun Video Microphone with Fuzzy Windbuster For Sony Alpha SLT-A33, A35, A55, A58, A65, A7, A7R, A77, A77II, A99, DSLR330L, NEX-3N, NEX-5T, NEX-7K, NEX-F3 Digital SLR Cameras Transducer type: Condenser (unidirectional) Frequency response: 35 Hz - 20,000 Hz Nominal / Load impedance: 200 Ohm or less Sensitivity (Short) Long: -40 dB/ +/- 1dB / 0dB = 1V/Pa,1kHz Signal Noise: 75 dB or more