QQ-Tech&reg; PCI &ndash;e PCI Express 4 port USB3.0 hub Card adapter 5Gbps Supper speed VLI VL800 chipset PCI-e TO USB3.0 (4Ports), Compatible with USB 2.0 & 1.1/1..0 specification; Supports external power socket in order to supplying power for each USB 3.0 connector up to 900mA Max/port; Supports Low-speed (1.5Mbps)/Full-speed (12Mbps)/High-speed (480Mbps)/Super-speed (5Gbps/ 625MB/s); Built-in optional LP4 Molex power connector for bus-powered USB devices; Supports all USB compliant data transfer type as follows; Control/Bulk/Interrupt/Isochronous transfer; Compliant to Extensible Host Controller Interface (xHCI)Specification Revision 0.96 VLI VL800 Chipset; Supports Windows XP/Vista/ 7/ Server 2008