5.1 surround sound, 3 audio outputs, flexible component home theater. Built-in plug-and-play sound card, not easily damaged by the outside world, quality without noise. Support HRTF3D music; Support Direct Sound 3D and A3D interface; Built-in high-fidelity 32 OHM headphone buffered 3D surround sound field; Support 5.1 channel mode; Support Direct Music Support 98/ 2000/XP/win7 Product type: built-in plug-and-play sound card Product chip: CMI8738 Bus interface: PCI-E X1 (compatible with X4, X8, X16 graphics card interface) Product channel: 5.1 surround sound card Support system: 98/ 2000/xP/win7 Colour:Red Material:PCB Package Contents: 1 x PCI-E Sound Card Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.