Features: Condenser headset microphone with 3-pin mini XLR plug is compatible with wireless bodypack . Highly sensitive high dynamic and wide frequency response. Head-mounted design gives you the 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 : 50Hz-16KHz Sensitivity: -39dB±1dB/（0dB=1V/Pa at 1KHz） Output Impedance: 680Ω±30%(at 1kHz) Operation Voltage：DC 1.0V-10V Standard Power Supply：DC1.5 V Current Consumption: ≤0.5mA Signal to Noise Ratio: ≥56dB Cable Length: 1m Packing List: 1 * Microphone 1 * Windscreen