Fangrui Product Details Virtual 8.1 Channel: Multi-channel Technology, Strongly 8.1 Channel Dynamic Sound. It Turns Your Stereo Speaker Or Earphones Into 8.1 Channel Environment. Usb Port: Usb Bus-powered Mode ,no External Power Required. Compliant With Usb 2.0 Full-speed Specification. Function: Reduce The Noise And The Sound Is Deep, Enjoy The 3d Sound Effect.a Highly Flexible Audio Interface Which Can Be Worked Either With Desktop Or Notebook Systems. Plug-and-play: No Drivers Required,just Plug And Play For Instant Audio Playback, Also Compatible With All Major Operation Systems. Application: Headphone Amplifier For Computer Enhance Bass And High Pitch. Suitable For , For Linux, For . Item Type: External Sound Card Size(l X W X H): About 61 X 28 X 12.2 Mm Input Interface: Usb 2.0 Support System: For Xp/for Vista/7/8/10/for Os/for Linux Other Functions: Mute Switch, Volume Adjustment Support Channel: 7.1 Channel Due To Different Product Batches, The Appearance , Which Does Not Affect The Use. Colour:as Shown Material:plasti