One USB interface is expanded into three, compact, practical and convenient. Three 2.0 USB interfaces are extended, and each power supply is up to 500mA The second generation USB hub controller is adopted Directly connected with the computer, without external power supply, simple and easy to use Computer automatic identification installation, no driver, plug and play, plug and pull USB2.0 interface, support usb1.0 / 1.1, transmission speed 1.5/12/480mbps