Power Converters
Different countries use different types of electrical outlets and power points, meaning that what works for you at home won’t necessarily work while you are away.
Different countries also have a wide range of electrical voltage running through their wires. In the U.S., for example, electricity runs on 110-120 volts, whereas many other countries have ramped that up to between 220-240 volts.
This matters, because you could fry your appliances if you expose them to a higher voltage than they were designed to use.