This adapter is for TYPE B wall outlets which can be found in: The United States, Canada, Mexico, Costa Rica, and parts of the Caribbean.
Before using earthing grounding product, you must ensure that your Type B three-prong wall outlet and/or power strip is grounded.
Step 1: Test Your Three-Prong Wall Outlet
Plug the Outlet Checker into the wall outlet or power strip that you’d like to test.
Step 2: Two Amber Lights = Grounded
When the center and right lights are illuminated together, your outlet is properly grounded.