A voltage converter is a device that allows appliances made for the voltage of the common electrical outlets of one geographical region for the outlets of another area. Most single phase alternating current electrical outlets in the world have a voltage range of 210 to 220 volts or a range of 110 to 120 volts. Converters can double or step up the voltage or halve or step down the voltage. Plug end adaptors provide conversion of the size and shape of the plug end. If voltage conversion is not needed the plug adaptor can be used without a voltage converter. Goodman's carries a full of international foreign travel transformers, voltage converters, plug adapters and more.