Feature highlights: Audio brilliant: compensates the details and clarity of compreed audio data. Dynamic ba: increases the ba reproduction capability of headphone. Smart volume: normalizes sound levels of different audio contents. Voice clarity: improves clarity of received voice from VoIP application. Multi-function keys support microphone-mute, speaker-mute, volume-up, volume-down, former-song, next-song and stop/ start. Product description: PC gaming details in vivid sound effects and directional sensation. Expanded music listening for rich and spatial enjoyment. Surround sound for immersed theater experiences. VoIP chatting without worrying about the noise around. VoClear ENC dual omni-mic close-talk voice capturing technology. USB spec. 2.0 full-speed compatible and USB-IF certification. USB audio device cla spec. 1.0 compliant. USB HID device cla spec. 1.1compliant. User friendly and customizable UI. Programmable GPIO for hardware controlled surround and ENC switches and LED. Supports for Windows 98SE /ME /2000 /XP /Vista /WIN7 /WIN8 /Server /MacOS 10 or higher. Specifications: Material: Plastic, Electronic component Sound card size: Approx. 83 *43 *13 mm weight: 20 g Notes: 1 If you are reseller, bo, buine man,and you need large number items,please feel free to contact us. we can offer you best discount. 2We will test the product before shipping,and please contact us if you have any problems. 3 We sell it without retail packages, And please contact us if you need them(Need to pay more a little). Packing List: 1X 8.1 Channel USB Sound Card