StarTech.com 4 Port ExpressCard Laptop USB 2.0 Adapter Card (EC400USB) Easily add four USB 2. 0 ports to your notebook computer Features high speed data transfer rates of up to 480 Mbits/sec Hot swap capabilities allow you to connect and disconnect devices without turning off your computer PC and Mac compatible Backward compatible with USB version 1. 1 Connect up to 127 devices by cascading multiple hubs Combined Data transfer rate of up to 480 Mbps Easy plug-and-play installation