Rockstone Power 1000 Watt Heavy Duty Step Up/Down Voltage Transformer Converter - Step Up/Down 110/120/220/240 Volt - 5V USB Port - CE Certified [3-Year Warranty] 1000 Watts Heavy Duty Step Up/Down Voltage Transformer Converter. Step Up Voltage from 110-120 Volts to 220-240 Volts. Step Down Voltage from 220-240 Volts to 110-120 Volts. Patented Simultaneous 3-Mode Output: 5V USB Port / 120V USA Output Socket / 220V Universal Output Socket. CE Certified. 3-Year Manufacturer's Limited Warranty. Metal Casing. Full Range Fuse Protection. Full Range Over Current Protection. RockStone Power proudly supports the United States Military since 2001. Shipping is available to all Overseas Military APO/FPO/DPO addresses. For safety reasons, it's recommended to use a Voltage Converter/Transformer that's max watts is at least 50% higher than your appliance. For example; this 1,000 Watt transformer can be only be used with an appliance that uses up to 600 Watts that is to prevent damage from the transformer itself and the appliance being used. Package Contents: Rockstone Power 1000 Watt Heavy Duty Voltage Transformer Converter, Hardwired Heavy Duty Insulated Power Cord with USA Grounded 3-Prong Plug, American to European Grounded Schuko Wall Outlet Plug Adapter, 2 PCS Spare Fuses, and Instruction Manual.