Features: 1.Full?duplex 5.1?channel PCI?Express sound card, using for CMI8738 multi?channel sound chip. 2.Complied with PCI?Express x1 revision 1.1 and 66 Channel AC'97 revision 2.3. 3.24?bit sound sampling rate, 48KHz supports playback and recording. Support front L/R, surround L/R, Centre/Subwoofer. 4.When the PC power is off or on, it has a noise balance cancellation function. Support for Windows 7/for Vista/XP 32/64?bit PC computer with PCI?Express slot. 5.It adopts PCI?Express bus slot, supports 6?channel surround sound output, supports for DLS sound library technology, supports for A3D 1.0 and for DS3D, and is compatible for DirectSound 3D and for EAX sound effects. 6.Provide surround sound field and clear sound quality, suitable for home theater, large-scale 3D games, enjoy music and other entertainment. specification:Item Type: Audio Sound Card Material: PCB Channel: 5.1 Interface: PCI-E Sampling Rate: 24-bit, 48 KHz Application: Suitable for home theater, large 3D games, music and other entertainment. PackageList: 1 x Sound Card 1 x CD Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.