Sabrent 7 Port USB 3.0 Hub with 4A Power Adapter for Ultra Book, MacBook Air, Windows 8 Tablet PC - Black [VIA VL812 Chipset] (HB-RU37) Safe and reliable. Voltage and Current overload protection(surge protector) protect the Hub and conneted devices from electronically accident Supports Plug and Play and hot swapping. No installation of drivers required for Windows XP / Vista / 7 / 8 or Mac OS X 10.2 and above. 10 SuperSpeed USB 3.0 ports support data transfer rates of up to 5Gbps. (Note: actual rate will depend on the capability of your device.) Backward compatible with USB 2.0 / 1.1.