4-Ports USB Hub. Is great for devices, such as printers, memory sticks, digital cameras and other computer devices. Support USB1, 0/1.1, compatible with USB2.0, the speed up to to 12 Mbps. Second-generation USB HUB controller, each USB port supply up to 480MA. Streamlined ultra-slim design and work lights. Built in overload protection circuit and no external power supply. Computer automatically recognizes install without driver.