75 mm x 51 mm x 14.5 mm 38g Add 4 USB ports for simple device expansion USB 3.0 for data speeds up to 5 Gbps, which is 10x faster than USB 2.0 1.5 AMPs are available to fast charge smartphones and/or a tablet when hub is plugged into a wall outlet for external power Plug & Play installation with no driver downloads necessary Compatible with systems running Windows XP or above and macOS 10.6 or above Charging ports are compliant with USB BC 1.2 standard and compatible with BC 1.2 devices such as iPad® 4th gen, iPad Air™ and iPad mini (check your device specs)