1、Condenser headset microphone with 3-pin mini XLR plug is compatible with wireless bodypack transmitter. 2、Highly sensitive, high dynamic and wide frequency response. 3、Head-mounted design gives you the freedom of movement and performance. 4、With foam windscreen for effectively reducing environmental noise. 5、Wide application, can be used for speech, teaching, tour guide interpretation, etc.Monomer: Back electret typeDirectivity: Unidirectional Frequency Range: 50Hz-16KHzSensitivity: -39dB±1dB/（0dB=1V/Pa at 1KHz） Output Impedance: 680Ω±30%(at 1kHz) Operating Voltage：DC 1.0V-10VStandard Power Supply：DC1.5 VCurrent Consumption: ≤0.5mASignal to Noise Ratio: ≥56dB Cable Length: 1m Monomer: Back electret typeDirectivity: Unidirectional Frequency Range: 50Hz-16KHzSensitivity: -39dB±1dB/（0dB=1V/Pa at 1KHz） Output Impedance: 680Ω±30%(at 1kHz) Operating Voltage：DC 1.0V-10VStandard Power Supply：DC1.5 VCurrent Consumption: ≤0.5mASignal to Noise Ratio: ≥56dB Cable Length: 1m 1 * Microphone1 * Windscreen Foam