Features: Brand new and high quality PCI bus-master access. Hot-pluggable: allows plug and play connectivity. Enhanced speeds: data moves up to 480Mbits/sec (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 Windows 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 Microsoft Windows 98, ME, 2000, XP,Vista Operating System. Support System:Vista,Windows 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. Specifications: Item: PCI to 4 Port USB 2.0 Card Transmission rate: 480Mbps Main chip: VIA chip Package Includes: 1 X USB 2.0 4 Port 480Mbps High Speed VIA HUB PCI Controller Card Adapter note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!