Product Description: Microphone material:steel mesh + zinc alloy tube Sensitivity :45 dB ± 1 db Frequency Response :20Hz-20kHz Output Impedance :150? ± 30% (1 khz) Load impedance :?1000 ? Equivalent Noise level:16dBA S/Noise Ratio:78dB Max SPL :130dB Electrical current :3mA Microphone output...