GoldX Power Core 4-Outlet Surge Protector w/4-Port Powered USB Hub GoldXPowerCore System Kit w/Base, 4-port USB Hub and Upgrade Module GoldX GXSB-7555 PowerCore Base Features: Four (4) Surge Protected Outlets 56-watt DC Power Transformer Surge Warning Alarm 125 VAC, 15 Amps, 60 Hz 3-prong power cord 64-inch cord length (Approximate) LEDs: Power Surge Ground Specifications: UL Clamping Voltage: 3 lines at 330V