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 3 amps are available to fast charge smartphones andor a tablet when hub is plugged into a wall outlet for external power compatible with systems running windows 8 187vistaxp and mac os x 10 6 or later 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