Voltage transformers are required to alter the electrical output of the power source. A 220v to 110v transformer is needed to generate power from a 220 volt device used in a 110 volt region. In other words, it can make a 220 volt appliance work on a 110 volt socket. Using a 220v to 110v transformer is much more practical than rewiring,
especially if you travel or relocate a lot and cannot live without your certain 220 volt devices.
Many electronic devices, power tools, and appliances are designed to be used for a specific type of voltage. But sometimes, their voltage may not be available in a certain country. In that case, you need a power converter or a transformer to power down the device. A 220v to 110v transformer will step down the electricity of a 220 volt appliance to make it useful and safer to operate in a 110 volt outlet. Hence, if you travel from a 220 volt region with 220 volt devices to an 110v region, you need a step down converter.
Some transformers can act as a step down and a step up converter, which can be useful if you use both 220v and 110v devices. This way, you can easily take your electronics with you; even you travel to and from 110v and 220v regions. You can find and purchase a wide range of 220v to 110v transformers online from a store that sells branded 220v and 110v appliances. Take note that some transformers might be heavy or bulky, so you might want to get something more portable if you travel a lot.
Larger transformers are usually needed by individuals who stay in one place for weeks or months before relocating to another country again. These devices let them easily power their most important devices, like televisions, laptops, and media players.