The card is suitable for the interface ExpressCard 54 mm. With this USB 3.0 ExpressCard you can two additional USB 3.0 ports for your notebook easily and comfortably. Compatible with ExpressCard 54mm Slitz Plag and Play Power supply: USB power supply, external AC adapter FL1100 chip With 3 USB 3.0 ports transmission rate up to 5 Gbps Supports USB series (compatible with USB 1.1/ 2.0) 1.5/ 12/ 480Mbps, 5Gbps transmission rate ExpressCard/ 54 standard Supports Windows XP, Vista and Windows 7 Material: Plastic + metal Package Contents: 1 x ExpressCard 1 x CD Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.