Vidpro XM-40 Condenser Shotgun Video Microphone with Fuzzy Windbuster 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