Wall Sockets and Electricity in Brazil - most (not all) is 220 while in the US it is 110. (Most phones, tablets, and laptops are dual but please check yours.) *
Would you like us to buy plug adapters for you? The wall sockets use unique.... they are 3 holes or 2 (old buildings have both) with rounded points. The cost is about $3 US each and you would reimburse the Monlam team in Brazil when you get the adapter from them. You can also purcahse them from Amazon. (You may want to have them for your journey in case you have an extended stay at a Brazilian airport.)