... MDTC-E006 4 ports usb 2.0 hub 1,4 ports 2,supports USB2.0/1.1, 3,No driver required ... ,plug and play,support hot swapping; Item NO: MDTC-E006 4 ports usb ... Extend 4 USB ports,each supplies power 500mA (max.); USB 2.0 high speed transfer port, compatible USB 1.1 downwards; ... protect your computer and device from damaging. Internal USB line LED will flash to indicate the operation ...