Customize Driver unit 50 mm. Headphone frequency response 20Hz - 20kHz Headphone input impedance is 32 ohms Headphone sensitivity is 109 dB USB connector Wire length +/-2m Microphone frequency response is none Microphone impedance is 2.2 kilo ohms Microphone sensitivity -38+/-2 dB Black color 2 year warranty Option not available Contains FPS, RTS, MMORPG and MOBA games Audio system design Meanwhile, it is up 5-10% This is why 8D is a great game This is the truth Version 7.1 sound system No need to worry about this, thanks