Goldsource STU-750 Voltage Converter: AC 110V / 220V 750W Step-up and Step-down AC Voltage Transformer - Maximum Load Capacity (MLC): 750 Watts Step Up/Down transformer converts 220-240 volts down to 110-120 Volts or 110-120 volts up to 220-240 volts. Simultaneous 3-mode Output: 5V (USB) / 120V (Standard US outlet) / 220V (Universal outlet) Four input voltages selectable: 110V/120V/220V/240V All range fuse protection with two spare fuses included. CE certified & 3-year manufacturers limited warranty.