Four USB 3.0 ports for easily connecting additional devices USB 3.0 for transfer rates of up to 5 Gb/s (ten times quicker than USB 2.0) 3 Amperes ensures quick charging of smartphones and/or tablet when the hub is connected to an external power source via a mains plug Plug & Play installation with no drivers-download Compatible with systems running Windows 8.1/8/7/Vista/XP and Mac OS X 10.6 or later Ports with charging features fulfil the USB BC 1.2 standard and are compatible with BC 1.2 devices such as 4th generation iPads, iPad Air, and iPad mini (check your device specifications)