Model: USB 2.0 4-port 480Mbps PCI card PCI bus-master access. Hot-pluggable: allows plug and play connectivity. Enhanced speeds: data moves up to 480Mbits/s (Mb/s) High-speed (480Mbps), full-speed (12Mbps) and low-speed (1.54Mbps) data transfer rate. Reliability: complies with OHCI, EHCI and PCI standard Compatibility: supports USB 1.1 and 2.0 under 98 SE, Me, 2000 and XP. Via Chipset USB 2.0 5 Port (4 Eeternal Port+ 1 Internal Port) PCI Card Supports Up to 127 devices. Supports Device hot swap and wake-up. Support All USB-compliant devices. Support 98, ME, 2000, XP,Vista . Support System:Vista, ME/XP/2000/98 /SE Compliant with: Universal Serial Bus Specification Revision 2.0 Open Host Controller Interface Specification for USB Rev 1.0a Enhanced Host Controller Interface Specification for USB Rev 0.95 32-bit 33MHz host interface compliant to PCI Specification release 1.1 Material:PCB+metal colour:Black Package Contents: 2 x USB 2.0 4 Port VIA HUB PCI Controller Card Adapter. 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.