Tie Mike, Headset, Holder MX60H CTP 10 Headset HS-02 (EP Pin) HS-04 (3 Pin) HS-05 (4 Pin) Product Parameters Element: Back Electret CondenserPolar Pattern: Omni-directionalFrequency Response: 20Hz-20KHzOutput Impedance: 1K Ω ± 30%Max. Input SPL: 130dBS/N Ratio: ≥ 58dBDimension: Φ 3.5mm HS03 Microphone Holder C1 C2