Ideal for use with today's Ultrabooks and thin-and-light laptops, Transcend's SuperSpeed USB 3.0 Hub transforms a single USB 3.0 port into four, instantly expanding the number of high-performance USB 3.0 devices you can connect to your computer at the same time. As it is USB bus powered with the cable attached, no extra power adapter is needed. Plus, the ultra slim and portable design allows you to transfer files wherever you go. - SuperSpeed USB 3.0 interface (backwards compatible with USB 2.0). - Up to 10x faster than USB 2.0. - USB bus powered, no extra power adapter needed. - USB cable attached. - Ultra slim and portable design.