dds 4 USB 3.0 hi-speed ports. -Enjoy data transfer rates of up to 5Gbps and spend less time syncing (Note: actual rate will depend on the capability of your device.)， backward compatible with USB 2.0 / 1.1.) -Easily add 4 USB 3.0 SuperSpeed ports to your PC， laptops and tablets (including Microsoft Surface， Ultrabooks and MacBook)， eliminating the trouble of switching among devices. -Designed with a built-in surge protector to keep your devices safe. Supports hot swapping.s -Palm-grip size and "power-bar" design effectively saves space. Beautiful blue LED indicates operation. -Individual port Over-Current protection