Detailed Product DescriptionComputer headphone, stereo headphone with mic. CE & RoHS, 
USB jack and 3.5mm plug available. Adapt to game player, PC and others 
Specification for this computer headphone: 
* Speaker Diameter: Φ40mm 
* Frequency Response: 20Hz-20.000Hz 
* Sensitivity: 108dB +-2 dB 
* Impedance: 32Ω +- 15% 
* R. M. S: 50 mw 
* Plug (mm): 3.5 stereo 
Microphone: 
* Impedance: 2.2KΩ 
* Sensitivity: -58dB+-2 dB 
* Frequency response: 50-16000Hz