Style: On-the-Head. Product name: Stereo Headset. Frequency Response: 20 Hz ~ 20 KHz. Nominal Impedance: 32 ohms. Microphone Sensitivity: -58 db. Sensitivity: 105 dB±3 dB (at 1000 hz). Speaker Diameter: F40 mm. Earphone / Microphone Plug: 3.5 mm Stereo. Controller: Volume knob on the headset. System Requirements: WindowsXP / Vista / 7 / 8 / 8.1 / 10.