The type of power and outlet used in the United Kingdom and the United States are different; if a power converter is used, an electric toothbrush from the United Kingdom works in the United States. Examine the power cord to verify the voltage before using.
The United Kingdom uses a voltage of 230 volts with a frequency of 50 hertz, while the United States has a voltage of 120V and frequency of 60 hertz. An adapter is also needed to connect the power cord to the outlet as the standards are different between the two countries. The United Kingdom's power plug uses two cylindrical prongs instead of the two rectangular prongs (often with a third cylindrical one) used in the United States.