MDTC-E004 4 ports usb 2.0 hub 1,4 ports 2,supports USB2.0/1.1, 3, ... swapping; Item NO: MDTC-E004 4 ports usb 2.0 hub Feature Extend 4 USB ports,each supplies power 500mA (max ... .); USB 2.0 high speed transfer port, compatible USB 1.1 downwards; the transfers speed is up ... of the color. MDTC-E004 4 ports usb 2.0 hub