For laptop users with no USB3.0 high-speed interface, expands the notebook's 34mm Express expansion slot by two USB3.0 high-speed interfaces Fully compliant with ExpressCard Specification 1.0. Complete single-wire (or x1) PCI Express throughput Compliant with Universal Serial Bus 3.0 Specification Revision 1.0. Complies with Xhci (Extensible Host Controller Interface) Specification Revision 1.0. Support multiple USB3.0, USB 2.0 and USB 1.1 simultaneous operation of equipment Support USB data 1.5 / 12/480/5000 Mbps transfer rate Expansion of two external USB3.0 -high-speed system ports Hot-swap feature that allows you to connect / disconnect without shutting down the system power supply Driver Microsoft Windows 2000, XP, Vista and 7 operating systems Certification CE, FCC, RoHS and Microsof