4 USB2.0 A-type female portsMade of high-strength ABS plasticLightweight, ultra-thin, and easy to carryLED indicator design to control the power statusSupports hot-swap, plug, and play, easy to useDriver-free support for Windows XP/Vista/7/8, Mac & Linux with USB supportComply with USB2.0 technical specifications, data transmission is safe and stableSupports overload voltage and instant current protection functions, effectively protecting the connected equipment and the HUB itself