Specifications: 5 channel sound card. Applicable to the field of home. 24 bit sample median. The type of PCI bus interface. Own interface front-channel output, in the home/bass channel output, rear channel output, surround sound output, microphone input, line transmission. Customize internet audio with the power and surround sound of EAX audio technology. HRTF-base 3D positional audio, supporting direct sound 3D, EAX and A3D interfaces. Supports EAX, karaoke key, and echo sound effects. Complies for Microsoft PC99 specification. Item Name: Sound Card Style: Internal Interface Style: PCI Channel: 5ch Chipset: CMI8738-6CH System Interface: 32-bit PCI Express x1 Bus Master Operation System: for WIN2000/XP/VISTA/win7/linux Size: 12cm x 9.5cm/4.72"; x 3.74"; (Approx.) Notes: 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. Package Included: 1 x Sound Card