Description: for laptop users with no USB 3.0 high-speed interface, expands the notebook's 54mm Express expansion slot by 3 USB 3.0 high-speed interfaces Fully compliant with Specification 1.0. Complete single-wire (or x1) PCI Express throughput This product 54MM wide Express Card slot 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 three external USB3.0 -high-speed system port Meet USB3.0 5 V / 900mA output power level. 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 Microsoft WQHL approved. Specification: Material: aluminum alloy Size: 73 * 54 * 5mm Package Includes:(2 Pack) 1x adapter 1x CD