Features: Condenser headset microphone with 3.5mm lockable plug, compatible with Sennheiser 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: Type: Condenser Microphone Directivity: unidirectional Frequency : 50Hz-16KHz Sensitivity: -39dB +/-1dB(0dB=1V/Pa at 1KHz) Output Impedance: 680Ω±30%（at 1kHz） Plug: 3.5mm Cable Length: 100cm / 39.4in Package List: 1 * Microphone 1 * Windscreen