SPECIFICATIONS Style: On-the-Head Speaker: 40 mm Frequency Range: 20 Hz-20 KHz Impedance: 32 Ohm RMS: 50 mW Sensitivity: 102 dB MIC Sensitivity: -45 dB Cable Length: 2 m Plug: USB Controller: Volume knob on the headset System Requirements: Windows 7 / 8 / 8.1 / 10 / Mac OS X