To determine the correct model voltage converter or heavy duty transformer you need, you must first find the "watts" of your appliance(s). You can find this information listed on the appliance manufacturer's label located on the back or bottom of the appliance or in the specifications section of the appliance owner's manual. We recommend using a Voltage Converter / Transformer with a rated wattage at least 50% higher than your appliance(s).
Items such as TVs, microwave ovens, laser printers and power tools require a transformer with 3 times the watts rating on the equipment. This is because of the initial surge of power required when they are first turned on.
Voltage converter are rated within a voltage range. Appliances rated for 110 volts or 120 volts can usually operate anywhere between 100 volts and 127 volts. Likewise, 220 volt or 230 volt appliances can usually operate anywhere between 220 volts and 240 volts. Therefore, any quality Step-Up voltage converter allows any 110 volt appliance to operate in 220, 230 or 240 volt countries and quality Step-Down voltage converters allow any 220 volt appliance to operate in any 110 volt or 120 volt country.