Supports Transfer Speeds up to 5Gbps (USB 3. 0), 480Mbps (USB 2. 0), 12Mbps (USB 1. 1)(theoretically 10 times faster than USB 2.0) 4 USB 3.0 ports support the connection of 4 USB devices simultaneously Compatible with USB 2.0 USB 1.0 Computer USB Extender. Compatible with iMac, MacBook, Mac Pro/ Mini, surface Pro, XPS, notebook PC, mobile HDD and more. Build in overvoltage/overcurrent/ leakage and short-circuit protection unit. LED indicates activity status. Compatible with Windows 10/8/8. 1/7/ Vista/ XP and Mac OS X, Linux and chrome OS.