1500W Voltage Converter

To make it easier to find the right one, ask for a "European" adapter. It's 2 round prongs.
If your gadget doesn't support the 2 voltages, you'll have to get an adapter that changes the 220 coming from the wall to 110 for the appliance. These can be expensive. If we're talking about a hairdryer, you're probably better off getting a new hairdryer overseas.

1500 Watt Voltage converter can be used in 220V countries and 110V countries. It will convert from 110V-120V to 220V-240V and from 220V-240V to 110V-120V. The 1500W voltage converter is rated at 1,500 watts maximum. It features a heavy-duty cord with a standard US 3-prong plug. There are a total of three outputs on the front panel.

The world runs on two types of electricity: 110/125V or 220/240V. North American devices run on 110/125V electricity while the majority of the world runs on 220/240V. Converters and transformers change the voltage of electricity to match the voltage of your device.

A "220V to 110V voltage converter" is an electronic device designed to reduce 220 volts to 110 volts. It does this by cutting off half of the peak-to-peak sine wave. Very simple. Thus, the electricity varies from zero to max volts and back to zero. It does not go to negative volts. It stays at zero volts for half of the sine wave. Therefore, what comes out of a converter is on-off power, at a frequency of 50 Hz.