Features：? Sleek Apple-style design ideal For Mac Pro， iMac， MacBook Air， MacBook Pro， MacBook， and Mac mini ? Adds 4 USB 3.0 ports to your computer; Built-in surge protector safeguards your devices ? Easy to set up， Plug & Play， Hot swappable ? Saves on syncing time with data transfer rates of up to 5 Gbps ? Bus Powered - does not require an AC adapter ? Compatible with USB 2.0 and 1.1 specifications. System requirements? Mac OS X 10.6 & higher ? Windows 98SE /ME /2000 /XP /Vista /7/8 ? Linux 2.4 or above Package contents? USB 3.0 Premium 4 Port Aluminum USB Hub