The usb 30 4 port hub is compliant with usb 30 specification while also being backward compatible with the usb 20 specification the usb superspeed hub allows for easy connection of up to 4 usb 30 devices to your computer such as an mp3 players digital cameras or hard drives the streamlined sleek and compact design is the perfect solution for usb port expansion the removable aluminum base can be hard mounted to your desk the hub easily slides from the base and makes it convenient for