Bus Type: 32 Bit PCI Plug & Play External connectors: 2 x Type A USB Female Internal connector: 1 x PCB mounted pin header (9 Pin) EHCI based 480Mbit/sec USB 2.0 Hi-Speed compliant OHCI based 12Mbit/sec USB 1.1 compliant Connects USB 2.0 or USB 1.1 devices to your computer Chipset: Via PTC Resettable fuses for each port Supplied with both standard and low profile brackets Software Compatibility: Windows 2000/XP/Vista/Windows 7/8/Server 2003, 2008 2 Year warranty