Product Information: 
 Headphone type: Headphones 
 Headphone output source: general 
 Plug diameter: USB. 
 Plug type: USB wired headset. 
 Microphone: Yes 
 Sound principle: moving coil. 
 Frequency response range: 20-20000 (Hz) 
 Impedance: 32 (Ω) 
 Sensitivity: 114 (dB) 
 Wire length: 2 (m) 
 Speaker diameter: 50 (Φmm) 
 Earplugs/earmuffs material: metal
Color: 
   A version: black official standard,
B version: black 7.1 channel version official standard