Tera Grand USB 3.0 4 Port Hub with Power Switch, 5V 4A(USB3-VE657) Compliant with USB 3.0, 2.0 and 1.1 Super Speed (5 Gbps) transfer rate Charges smartphones, tablets, iPhones and iPads from the extra Charge port on this hub Supports Windows 8, 7, Vista, XP, 2003, 2000, Mac OS 10.X, Various Linux Kernals Includes an external Power Adapter 5V 4 Amp --- enough power for all of your electronics