You Do Need power plug adapter while traveling from Eritrea to Bonaire.

Here is Why You Need An Adapter

The outlet and plug type used in Bonaire are A and C and in Eritrea are C and L. This is how they look like.

Eritrea

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

Type C

Type L

Bonaire

In Bonaire, outlets of type A and C are in use.

Type A

Type C