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A4tech HS100 Headset.
Volume and Microphone Switch In-Line---Quick Access Headset Volume Control and Microphone.
3.5mm Earphone and Microphone Plug to be Connected with your Computer.
Easy Adjustable Headband Ensures Optimum Fit and Comfort.
Earphone Hook Included.
Frequency Response: 20Hz-20kHz.
Nominal Impedance: 32ohm.
Sensitivity: 111dB±3 dB.
Cable Length: 6.5 feet.
Microphone Sensitivity: -58 db±3db.