Travel Tip #8: When traveling internationally, bring adapters for your electronics. Not all countries have the same-shaped electrical outlets. But you’ll also want to check to see what the voltage is for the country/countries you’re visiting. Without an converter, you’ll fry your gadgets and stink up your hotel/hostel room. (Not fun. I fried a sweet set of portable iPod speakers in China last year. Black smoke poured out of the outlet and the room smelled like burning plastic. So check or calculate the wattage before you plug anything in!) Final word: Adapters change the outlet so your plugs fit and converters convert the electricity to prevent power surges.
This link shows the various plugs and the corresponding voltage in nearly all countries in the world: