Specification: Model: LY-VT-5000VA Output Power : 5000 Watts Input Voltage: AC 110V / 220V Output Voltage: AC 220V ±8% / 110V ±8% Boot delay: 5s Current (A): 10A(110V) 5A(220v) Insulation Resistance: ?2? Protection: Over-voltage / Under-voltage / Overload / Over Temperature delay protection / L ighting protection 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).