Link multiple USB devices to 1 computer with ultra-compact hubs. Tripp Lite's 4-Port Self- or Bus-Powered Ultra-Mini USB Hub is the ideal solution for increasing the number of available USB ports on a laptop/notebook computer. The unit features an ultra-mini pocket-sized case. A hide-away USB cable connects to the computer. The hub does not require external power, software or complicated set-up procedures. Powers most applications without use of an AC power adapter (included). The hub features plug-and-play / hot-swappable connection of devices