Stack. Power. Connect.Surge Protection! The GoldX GXSB-7555 PowerCore Base features four surge protected outlets and a 56-watt DC Power Transformer! The PowerCore Base has a patented feature of being able to pass surge protected 12 volt power from its top power port to PowerCore devices! Add this GoldX GXSB-1110 Surge Upgrade Module to the PowerCore Base and protect your equipment from dangerous electrical power line surges! Features include 1110 joule surge protection and an audible surge protection alarm failure! Add up to 4 additional USB devices to your PC! This GoldX GXSU-104 PowerCore 4-port USB Hub delivers up to 12 Mbps data transfers and allows you to connect up to 127 USB devices to a computer! Simply stack the USB Hub on the top power port of the Power Base and you're ready to transfer data from your USB devices to your PC! Order GoldX PowerCore System Kit today!