Williams AV MIC 144 Headset MicrophoneHeadset microphone with TRRS 3. 5 mm plug for use with Digi Wave DLT 400 transceiver only. Specifications Microphone Element Electret Condenser, Noise Cancelling Microphone Sensitivity 62 + 4dBv bars @1kHz @1 4 Microphone Frequency Response 100kHz 10 kHz Microphone Signal to Noise Ratio More than 60dB @ 1kHz Earphone Sensitivity 105dB SPL Typical at 1kHz @ 1mW on flat plate coupler Earphone Impedance 32 ohms typical @ 1 kHz Boom Gooseneck Plug 3. 5mm
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