COYO Creative Cute High Speed Lilliputian Hub Usb 2.0 Extension 4 Points Line Device White Usb Hub Adapter for Laptop PC 1.The extension of four USB interface, each power supply up to 500 ma. 2. Use the second generation of new USB HUB control chip. 3. No need to external power supply, convenient and easy to use. 4. Without driver, plug and play, support hot plug. 5. Each USB interface is independent, compared with the ordinary HUB port, the independent design is more convenient to use