With its integrated automatic protection circuit voltage stabilizer, this unit is great for countries with unstable voltage supply. Heavy-duty metal casing and durable design make it easy to travel with and carry. Important: Remember to leave at least a 100% slack for the voltage converter transformer. Televisions, heating appliances, laser printers, halogen & fluorescent bulbs and power tools spike when you turn them on. For these products you need to buy a voltage converter transformer that is at least 3-4 times the items capacity.