Techshowe 4-Port Ultra-Thin Design USB 3.0 Hub with LED Indicator, USB-Powered and Support Super Speed 5Gbps Transmission Black LED indicator for power status, ultra-thin design, easy to use and carry Support USB 3.0 data transfer rate up to 5Gbps, downward compatible with USB 2.0/1.1 Drive free, plug and play, 4 USB 3.0 ports help eliminate the trouble of switching among devices Support windows xp/vista/7/8 and Mac OS, linux, solid port construction and ABS material endure years of use Backflow prevention circuit design, prevent electric current flow back to the device, protect the connected devices and itself