You Do Need power plug adapter while traveling from South Korea to United States of America (US) USA.

Here is Why You Need An Adapter

The outlet and plug type used in United States of America (US) USA are A and B and in South Korea is F. This is how they look like.

In South Korea, outlets of type F are in use.

Type F

In United States of America (US) USA, outlets of type A and B are in use.

Type A

Type B

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