……What kind of power outlets, American or European?
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My understanding is that the plugs are North American two pin type plugs. Unfortunately, the vast majority are 230 volt so you’ll toast any 110-120 volt device that you plug in without a converter. Some hotels provide 110-120 volt outlets. The bad news here is that it’s the same physical connector so you are depending on labeling or their word ….
Anything that’s dual voltage (most camera/phone chargers and laptop power supplies – check the label) will be ok. Anything else, be very careful. 
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