StarTech.com 2 Port CardBus Laptop USB 2.0 PC Card Adapter (CBUSB22) Hot swap capabilities allow you to connect and disconnect devices without turning off your computer Offers high speed data transfer rates of up to 480 Mbits/sec. PC, Mac, and Linux compatible Easily add two USB 2.0 ports to your laptop computer 40 times faster than USB 1.1 Backward compatible with USB version 1.1 Connect up to 127 devices by cascading multiple hubs Easy plug and play installation