Mvpower&reg;NEW 1PCS Express Card Expresscard 54mm to USB 3.0 Dual 2 Port Adapter for Laptop Notebook PC Computer USB3.0 5Gbps Support Express card 54 slot Support USB 1.1 / 2.0 / 3.0 Support USB 3.0 Specifications, Transfer rate up to 5Gbps Support transfer rate of 1.5/12/480Mbps, 5Gbps With USB bus power for external AC power supply Support Windows XP, Vista and Windows 7