... system should be installed driver)Product synopsisExquisite ports on king 4 mouth is neo-philosophy MAO new HUB, ball shape, output ... expanded four USB 2.0 portTrain USB 2.0 high-speed transmission, decentralization in USB 1.1Train without driver, plug and play ... mobile hard working normallyTrain interface is rich, good compatibility high speed usb hub,4 ports usb 2.0 hub,USB extension device