Voltage Converter, also known as the step down / step up power transformer. Due to the difference of power supplies in different countries, the designed voltage range of the electrical appliances is also different. The most common power supplies are 110v, 120v (America - USA, Canada etc.) and 220v, 230v, 240v (Europe & Asia - UK, Australia, Singapore, China etc.). Hence, a step down & step up voltage converter is necessary while you travel among different countries, or you buy an UK appliance but work on US domestic power grid. A voltage converter is built-in transformer for converting
- 110v to 220v,
- 120v to 240v and
- 230v to 110v,
- 220v to 120v etc.
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