?Charging & Data transferring:?Extend multiple USB A ports for your computer. In addition to connecting USB devices for data transmission, such as U disks, printers, etc., you can also charge mobile phones or small fans. ?5Gbps Data Transfer Speed:?USB 3.0 transfer data at speeds of up to 5 Gbps fast enough to transfer HD movies in seconds. Fits Mobile HDD. ?Plug & Play:?USB hub is compatible with most operating systems, No driver needed, Plug and Play for Mac, Windows and Linux. ?Fits Most of USB A devices:?1 x USB3.0 for Mobile HDD, 3 x USB2.0 for other USB devices, such as USB Flash Drives, Mouse, Keyboard, Printer etc. ?Multiple USB Port:?Expand 4 USB ports for your personal computer, Laptop, Expand your single USB A port into 4 ports to more devices working at the same time.