Most power adapters for electronic devices will take any AC input from 100-240v and transform accordingly to the device (which cares more about DC), but definitely check before plugging it in. The Americas and Japan are 100-127v, and the rest of the world is 220-240v with a few discrepancies here and there. They also range from 50hz-60hz AC, so some devices that rely on the frequency for time may slow or speed up depending on what region they were made and where they are used.