You Do Need power plug adapter while traveling from Syria to Palestine.

Here is Why You Need An Adapter

The outlet and plug type used in Palestine are C and H and in Syria are C, E and L. This is how they look like.

Syria

In Syria, outlets of type C, E and L are in use.

Type C

Type E

Type L

Palestine

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

Type C

Type H