Brand new and high quality. External USB virtual 8.1 channel sound card converter adapter. It can work with either desktop or laptop, it extends your stereo speaker or earphone to 8.1 channel environment, giving you high quality sound enjoyment. USB 2.0 full-speed, easy to use, plug and play, instead of the traditional sound card. Using the most advanced technology of Xear 3D. Multi-function keys, support microphone-mute, speaker-mute, volume-up, volume-down, former-song, next-song and stop/ start. Multi-channel technology, strongly 8.1 channel dynamic sound. Through the line-in interface, external connect recording equipment separate recording, and you can enter other audio sources. Support various sound formats/ music software output. Fit for DVD, digital products, music, game and online use. Compact, portable design, convenient to carry and store. Supports for Windows 98SE/ ME/ 2000/ XP / Vista/ WIN7/ win8/ Server/ MacOS 10 or higher.