Backward compatible with USB 2.0 and USB 1.x standards, this USB 3.0 hub still supports older USB devices and can also be used as a hub on older systems that do not have USB 3.0 ports. With the capability to mix and match USB 3.0/2.0/1.x devices and be used with or without the included external power adapter, this hub offers the best of versatility and portability.