SAWAKE 4 Port Silver Aluminum USB 3.0 Hub Compatible with USB 2.0 and USB 1.1 for Windows XP/Vista/7/8 and Mac OS This is a 4 ports USB 3.0 hub with high-performance aluminum control, it can expand four USB ports on the computer, and support four USB high-speed devices simultaneously. Support overload voltage and inter-current protection function, can protect the connected equipment and HUB itself effectively when suddenly energized. Support Windows XP/Vista/7/8 and Mac OS, with Bus-Power limit Current Protection of 900mA(When external adapter applied). Helps you to solve the problem when the USB port on your computer is not enough, can bring great convenience to you. Ergonomic slant interface design, humanized technology considerations, providing you a stable, durable and reliable performance.