Features: Condenser headset microphone with 4-pin mini XLR plug is compatible with wireless bodypack transmitter. Highly sensitive, high dynamic and wide frequency response. Head-mounted design gives you the freedom of movement and performance. With foam windscreen for effectively reducing environmental noise. Wide application, can be used for speech, teaching, tour guide interpretation, etc. Specifications: Monomer: Back electret type Directivity: Unidirectional Frequency Range: 50Hz-16KHz Sensitivity: -39dB1dB/0dB=1V/Pa at 1KHz Output Impedance: 68030%(at 1kHz) Operation VoltageDC 1.0V-10V Standard Power SupplyDC1.5 V Current Consumption: 0.5mA Signal to Noise Ratio: 56dB Cable Length: 1m Packing List: 1 * Microphone 1 * Windscreen