You Do Need power plug adapter while traveling from Trinidad & Tobago to Dominican Republic.

Here is Why You Need An Adapter

The outlet and plug type used in Dominican Republic are A, B and C and in Trinidad & Tobago are A and B. This is how they look like.

Trinidad & Tobago

In Trinidad & Tobago, outlets of type A and B are in use.

Type A

Type B

Dominican Republic

In Dominican Republic, outlets of type A, B and C are in use.

Type A

Type B

Type C