You Do Need power plug adapter while traveling from Gaza Strip to Swaziland.

Here is Why You Need An Adapter

The outlet and plug type used in Swaziland is M and in Gaza Strip are C and H. This is how they look like.

In Gaza Strip, outlets of type C and H are in use.

Type C

Type H

In Swaziland, outlets of type M are in use.

Type M

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