Logitech H151

Input Impedance: 22 Ohms

Sensitivity (headphone): 122dB +/-3dB

Sensitivity (microphone): -44dBV/Pa +/- 2.5dB

Frequency response (Headset): 20Hz - 20kHz

Frequency response (Microphone): 100Hz - 6.50kHz

Cable length: 5.9 ft (1.8m)