IOGEAR's 4-port USB 2.0 hub provides 4 Hi-Speed USB 2.0 ports for your high-speed connectivity needs. This device is USB 2.0 certified and provides a data transfer rate of up to 480 Mbps. The GUH274 is an updated, portable version of IOGEAR's first USB 2.0 hub, model GUH204; this updated version features a smaller form factor and new design. It supports Windows 98SE, 2000, ME, XP, and Mac OS X or later. The MicroHub 2.0 also supports USB 1.1 devices since it is backward compatible with USB 1.1 specifications. It is very easy to use,Plug-n-Play, hot swappable and portable. It is backed by IOGEAR's 3 Year Limited Warranty.