Sienoc Express Card Expresscard to USB 3.0 2 Port Adapter for Notebook Laptop PC 34mm Suitable for notebook computer (or contain ExpressCard Slot Computer) 2 x USB 3.0 specifications port Suitable for laptop and desktop with 34mm/54mm slot Transfer rate 5Gbps Support USB series specifications (Compatible USB 1.1 Full-Speed / 2.0 High-Speed) Support Super-Speed 5Gbps, High-Speed 480Mbps, full-speed 12Mbps and low-speed 1.5Mbps data transfer rate.