Fangrui Product Details Usb Hub Is A Device That Can Expand One Usb Interface Into Multiple (usually 4) And Make These Interfaces Available At The Same Time. Hub Is Also Known As A Hub, Which Uses A Star Topology To Connect Multiple Usb Interface Devices. Usb Hub Is Based On The 4 Usb Interfaces Provided By The Gl850g Chip For Expansion. Gl850g Has Product Features Such As Low Power Consumption, Low Temperature And Reduced Number Of Pins. Usb Hub Can Be Connected To Computer Desk Lamps, Computer Fans, Mp3, U Disk, Voice Recorders, Digital Cameras, Etc. Product Parameters: Working Voltage: Dc 5v Usb Port: 4 Usb Expansion Ports, Can Work Simultaneously. Output Current Of Each Port When Working Alone Up To 500ma, Can Be Used For Usb Lighting And Related Usb Devices Driver: Driver-free, Computer Automatically Recognizes And Installs, Plug And Play Protection: Built-in Current Overload Short-circuit Protection Device Speed: Support Usb2.0, Up To 480mbps, Backward Compatible With Usb1.1 Supported System: Win95/98/me/2000/xp, Linux2.