All of our sound machines that include an AC supply can be used with international power from 100 to 240 volts and from 50 to 60 Hertz. For use outside of North America, a plug adapter may be needed the included supply has a two blade North American plug. Some sound machines are available with interchangeable plugs that are for use in Europe and the United Kingdom as well as North America. There is a version of LectroFan that comes with an AC supply for use in Australia.