IOGEAR GIC250U 5-Port USB 2.0 PCI Card (USB 2.0) 40 times faster than the original USB; supports high speed data transfer rates of up to 480 Mbps Supports Mac OS 8.6 or greater, requires Mac OS X for USB 2.0 support, compatible with Windows 98, 98SE, 2000, Me, XP as well 1 internal type A USB port 4 external type A USB ports 3 year limited warranty