The Onikuma K9 gaming headset features 50mm drivers, a frequency response range of 20Hz-20kHz, and a sensitivity of 116dB +/- 3dB. It also includes a microphone with a dimension of 6.0 x 5.0mm, a sensitivity of -56dB +/- 2dB, and an impedance of 2.2kohm. The headset connects via USB (for LED light) and a 3.5mm audio/mic jack, with a cable length of approximately 2.2m. 
Detailed Specifications:
Driver Diameter: 50mm.
Frequency Response: 20Hz - 20kHz.
Impedance: 32Ω +/- 15%.
Sensitivity: 116dB +/- 3dB.
Microphone Dimension: 6.0 x 5.0mm.
Microphone Sensitivity: -56dB +/- 2dB.
Microphone Impedance: 2.2kohm.
LED Working Voltage: DC5V +/- 5%.
Connection: USB (for LED light) + 3.5mm audio/mic jack.
Cable Length: Approx. 2.2m.
Directivity: Omnidirectional.
Other Features: RGB LED lighting, 7.1 Surround Sound (some versions), retractable and flexible microphone.