Specification: Model: VTUS-5000-PRO Output Power : 5000 Watts Input Voltage: AC 110V / 220V Output Voltage: AC 220V ±8% / 110V ±8% Protection: Overload / Over Temperature protection Size: 10.6" x 7.87" x 6.1" (200 × 150 × 140 mm) Weight: 24.25 lbs (11Kg) >For Optimal Use: 1. For safety reasons, it's recommended to use a Voltage Converter / Transformer that's max watts is at least 50% higher than your appliance. 2. For example, if your appliance is rated at 100 watts, you need to buy a Transformer with a max power of at least 150 watts or greater. Some appliances, such as heating appliances, power tools, motors, laser printers and TVs, require 2-4 times more watts at start up than the printed rated wattage. 3. Please switch to the correct voltage before you plug in (110V in US).