This USB Hub has a dual purpose as a USB port extender as well as a USB fast charger. With it you can extend one USB 2.0 interface to 4 USB 2.0 interfaces for the connection of your devices with a Male USB interface such as your keyboard, mouse, USB Storage devices etc. through the 4 USB 2.0 female ports. You can also fast charge up to 4 mobile devices simultaneously through one power source with the Onten USB Smart Hub. 4 port USB 2.0 hub supporting fast charge. New standard security protection with a complete built-in security mechanism for protection against over-voltage, over-current, short-circuit leakage protection module each interface security mechanism, circuit protection, overcurrent protection, reverse power protection. Plug and play - no need for drivers as it comes with a high-quality smart chip. It comes with USB2.0 high-speed transmission as fast as 480MBs which is backward compatible with USB1.1/1.0 and capable of read speed of 38MBs and write speed of 36MBs. USB2.0 fast-charging capability. With micro USB power supply interface easy to charge multiple mobile devices up to 4 simultaneously. External power supply through Micro USB port (5V 2A)