SYBA PCI USB 2.0 4+1 port controller card Model SD-V2-5U Type: PCI to USB Card External USB Ports: 4x USB Ports Internal USB Ports: 1x USB Port Standard: USB 2.0 Data Transfer Rate: 480/12/1.5 Mbps Operating Systems Supported: Windows 98SE/ Me/ 2000/ XP Specifications: USB 2.0 EHCI and USB 1.1 OHCI Compliant Backward compatibile with USB 1.1 devices Transfer rate: Each port up to 480Mbps Connects up to 127 USB devices simultaneously Over current protection, each port 500mA Package Contents: Syba USB 2.0 controller card Software driver & Utility disc x1