You Do Need power plug adapter while traveling from Western Sahara to United States Virgin Islands.

Here is Why You Need An Adapter

The outlet and plug type used in United States Virgin Islands are A and B and in Western Sahara are C and E. This is how they look like.

In Western Sahara, outlets of type C and E are in use.

Type C

Type E

In United States Virgin Islands, outlets of type A and B are in use.

Type A

Type B

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