StarTech.com 4 Port CardBus Laptop USB 2.0 PC Card Adapter (CB420USB) 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 Easy plug-and-play installation Data transfer rates up to 480 Mbits/sec. (40 times faster than USB 1. 1) Connect up to 127 devices by cascading multiple hubs Backward compatible with USB version 1. 1