This is the best way to add an external power outlet. Well built and durable. Looks great when installed. I recommend a few things. When I installed. I applied silicone sealant around the base that slides through the wall. I also have silicone on the inside. I've also siliconized all the slots that allow knocking out, this eliminates drafts. I also siliconized the area where the cable runs. Zero draft. I insulated around it and fitted perfectly.