This Hi-Speed USB hub by GoldX PlusSeries allows the USB bus signal to be split from 1 down-stream signal to 4 upstream signals allowing for the bus to provide for either a fully powered Hi-Speed port for all USB peripherals to work properly or a bus powered hub for all low or self powered devices. The hub can be powered by a 5 volt 2 amp AC to DC power adapter supplies the full 5 volts, 500 milliamps per port.