The Seven Star automatic voltage regulator has a maximum output of 1000W and converts 110/120V to 220/240V or 220/240V to 110/120V. It has an on/off switch with an indicator lamp, heavy duty transformer for continuous use, analog voltage meter, integrated automatic protection circuit and a voltage stabilizer which is great for use in countries with an unstable voltage supply. The front of the unit has four outlets (outlets accept 3 or 2 prong US plugs and 2 prong Euro/Asian plugs), the insulated power cord is hard wired with a European Shucko plug which is also good for Asian outlets, the heavy-duty metal casing is designed to be durable and easy to carry with attached handle. This regulator comes with round and flat pin plugs for use in the USA, Canada, and Mexico. The fuse protection will cut off the current if the transformer is overloaded to protect the transformer and your appliance.