Vista Compatible 2.0 Four-port USB Travel Hub supports low-speed (1.5 MB per second), full-speed (12 MB per second), and high-speed (480 MB per second). Compact Bus/self-powered design offers overcurrent detection and protection, and Plug-and-Play ability for up to four USB devices. Travel hub is compatible with USB 1.1 and 2.0 as well as Windows 98, 98SE, ME, 2000, XP, Mac OS 9 and Mac OS X. The upstream port has one B-Type receptacle. The downstream port has four A-Type receptacles.