Specification: 1.The Hi-Speed USB 2.0 4-Port Ultra-Mini Hub. 2.Provides four downstream USB ports. 3.Plug-and-Play connectivity to your USB 1.1 and USB 2.0 devices. 4.A perfect lightweight travel tool. 5.This compact Hub tucks easily into the pocket of your laptop bag. 6.Virtually anywhere you need fast, handy access to your USB devices.