headphone jack to usb cable Specification:

headset with volume control (option )
mute function
headset with USB plug

Earphone

1) Impedance: 2 x 8, 2 x 16, 2 x 32, 2 x 40

2) Sensitivity: 110±3dB

3) Frequency range: 20 - 20,000Hz4) Rated power: 2 x 100mW

Microphone

1) Impedance: 1,800, 100, 200

2) Sensitivity: -48±3dB

3) Directivity: omnidirectional

4) Frequency response: 30 - 16,000Hz