Vigor Electronics USB 2.0 PCI - 5 Port Card includes four external ports in back and one internal port. It works with all types of USB devices including digital cameras, video cameras, printers, scanners, joysticks and more. With hot-swapping features for external hard drives, CD and DVD burners and scanners, it allows you to attach/remove USB devices without re-configure setting or turning your system off. Specifications : * Compliant with Universal Serial Bus Specification Revision 2.0 (All Data Rates 1.5/12/480 Mbps) * Compliant with Open Host Controller Interface Specification for USB Rev 1.0a (1.1 and 2.0) * Compliant with Enhanced Host Controller Interface Specification for USB Rev 0.95 forward * PCI v.2.1 multi-function device consists of Dual OHCI Host Controller Cores for full and low-speed signaling and one EHCI Host Controller Core for high-speed signaling * 32-bit, 33 MHz and higher host interface compliant to PCI Specification release 2.2 and up * Supports PCI-Bus Power Management Interface Specification release 1.1 * All downstream forcing ports can handle high-speed (480 Mbps), full-speed (12 Mbps), and low-speed (1.5 Mbps) USB data rate bi-directional transactions * 4 External Ports and 1 Internal Port * Over current protection, each port, industry standard to 500mA * Host Controller USB Type A, high insertation rate, connectors throughout System Requirements : * Windows 98SE through XP and Vista. For Apple Mac OS9 and OSX through 10.4.x * Full sized computer case with available PCI v.2.1 Slot * Includes Win98 and ME drivers on CD