Question about using Macbook in Vietnam.

I have a question about using Macbook in Vietnam. I bought my mac here in the US, and I'm going to visit Vietnam, but I'm wondering if I can plug in the power directly into the wall or I have to need any convert power modem for my mac. The only thing I know that Vietnam use 220V so, can anyone help me?

You may need a plug adaptor, but you don't need a power converter.
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