1. Full-duplex 5.1-channel PCI-Express sound card 2. Using VIA VT1723 Envy24D multi-channel sound chip 3. Comply with PCI-Express x1 specification revision 1.1 4. Comply with 66 Channel AC'97 specification revision 2.3 5. Sound sampling rate 24-bit, 48 KHz supports playback and recording 6. Supports front L/R, surround L/R, Centre/Subwoofer 7. Noise balance elimination function when the PC power is turned off or on System support Windows 7/Vista/XP 32/64-bit PC with PCI-Express slot Colour:black Material:PCB Due to different product batches, the appearance may vary, which does not affect the use Package Contents: 1 * Built-in audio 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.