Headphones
10 discrete Neodymium magnet drivers. Each ear cup contains: 
Subwoofer: 
40 mm Titanium coated diaphragm with Neodymium magnets
Frequency response: 20 Hz – 20,000 HZ
Impedance: 16 Ω
Sensitivity @ 1 kHz: 118 dB ± 3dB
Front: 
30 mm with Neodymium magnet
Frequency response: 20 Hz - 20,000 HZ
Impedance: 32 Ω
Sensitivity @ 1 kHz: 115 dB ± 3 dB
Rear: 
20 mm with Neodymium magnet
Frequency response: 20 Hz - 20,000 HZ
Impedance: 32 Ω
Sensitivity @ 1 kHz: 118 dB ± 3 dB
Center: 
30 mm with Neodymium magnet
Frequency response: 20 Hz - 20,000 HZ
Impedance: 32 Ω
Sensitivity @ 1 kHz: 115 dB ± 3 dB
Side: 
20 mm with Neodymium magnet
Frequency response: 20 Hz - 20,000 HZ
Impedance: 32 Ω
Sensitivity @ 1 kHz: 118 dB ± 3 dB
Microphone
Frequency response: 100 – 10,000 HZ
Sensitivity @1 kHz: -38 dB ± 3 dB
Signal-to-noise ratio: 58 dB
Pick-up pattern: Unidirectional ECM microphone
Audio control unit
Master volume, front speakers, center speakers, subwoofers, side speakers, rear speakers, microphone volume, microphone mute, audio mute, 7.1 surround sound / 2.0 stereo mode toggle and speaker / headset toggle
Cable: 3 m / 9.8 ft, braided fiber cable
USB Connector for power
PC connector: 3.5 mm microphone jack, 4 x 3.5 mm audio jacks
External speaker connector: 4 x 3.5 mm audio jacks
System requirements
PC with built-in 3.5 mm audio jacks & 1 USB port (for power)
PC or motherboard with analog surround sound ports (3.5 mm audio jacks x 5 or more) for true 7.1 surround sound.