It supports two modes of operation: - USB host mode and OTG mode, selectable by device mode select pin. - USB host mode supports four USB2.0 host ports and four USB host controllers. - OTG mode supports two USB2.0 host ports, one USB OTG port, and provides the function of selecting GPIO or ISA interface.Four USB2.0 host ports are integrated with on-chip transceivers and support four Enhanced Host Controller Interfaces (EHCI) and four Open Host Controller Interfaces (OHCI).USB OTG port is integrated with OTG PHY and supports host and device operation.Temporary ISA interface supports up to four serial ports and/or up to two parallel ports.Temporary 24 GPIO pins can be programmed as input or output.PCI Express, Single- (x1) PCI Express endpoint controller with integrated PHY, Compliant with PCI Express Base Specification Revision 1.1, Compliant with PCI Express card specification, Supports multiple DMA transactions, Supports eight PCI Express functions, Support message TLP (error) generation, Support legacy and interrupt mechanism, Support PCIe power management with ASPM supportUSB functionFour USB 2.0 host ports with on-chip transceivers,Can handle high speed (480Mbps), full speed (12Mbps) and low speed (1.5Mbps) ratesUSB 2.0 host port can support OTG functionFour Enhanced Host Controller Interface (EHCI) controllersFour Open Host Controller Interface (OHCI) controllersCompatible with batch, interrupt and isochronous USB devices, multiple high-performance USB devices run simultaneously, support USB power managementAs a peripheral, OTG supports High Speed ()/Full Speed () operationAs a peripheral, OTG supports the following endpoints: 1 control endpoint1 interrupt IN endpoint2 Bulk IN endpoints2 Bulk OUT endpointsSupports hot plug function allowing you to connect/disconnect devices without shutting down the system firstSystem RequirementsWindows 2000, XP/2003/Vista, Win 7 32/64bitA PCI Express capable system with an available PCI Express slotWorks with types of USB devices, including , removable drives, digital cameras, scanners, CD-RW, DVD-ROM, PC camcorders, printers, and more.Colour:Photo ColorMaterial:PCBPackage Contents:1 x expansion card1 x short iron pieceOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.