Add four external superspeed usb 30 ports from a single usb connectionr r connect usb 30 and older usb devices simultaneously at their respective maximum speeds with usb 201x backward compatibilityr connect high powered usb devices with the included external power adapter or simply use as a bus powered hubr r the st4300usb3gb 4 port superspeed usb 30 hub allows you to add 4 additional usb 30 ports from a single usb 30 connection to the host computer systemr r backward compatible with u