Plug bulky transformers into female section of adaptor and then plug adaptor into your outlet strip.This allows you to use all of the outlets in a power strip. I can't post more pictures because it won't let me edit, to close to closing. Also, when I took them out of the box, I saw there are only 3, my son must have used 2 and I didn't know it. There are only 3 in the picture, but title says 5. Sorry.