A4TECH Headset with MIC One Jack HS-8i

HS-8i Headset Speaker Unit: 40 mm Frequency Response: 20 Hz - 20 KHz Sensitivity: 100 db Impedance: 32 ohm Microphone Frequency Response: 100 Hz -10 KHz Sensitivity : - 44 dB Cable Material: Tangle-Free Cable Cable Length: 180 cm Port: 4-Pin 3.5mm Plug