CA-1810B Headset Microphone Type : Condenser Cartridge Diameter : Φ4mm Polar Pattern : Omni-directional Sensitivity : 18mv/Pal(-32dB+2dB) Frequency Response : 100Hz~20KHz Output Impedance : 1KΩ 30% Max SPL : 130dB Power : 2.0V-10V.DC S/N :>64dB Cable : 1.2M
