This does just what the listing says it does. You don't have to wear them but just place them in your home. You should hold each piece first to take anything away you have going on. These will also work if someome comes into the home or you go out and bring something back it will shower you with a clean energy upon going home.
All of these are designed to be worn but you don't have to. No matter what the negative is or who it is from this acts as a sponge and soaks it up then destroys it. Nothing is left when it is done. This never needs to be charged because they negative is a food kind of for the piece. If you want to every 6 months you can cleanse it by placing salt next to it for a few hours and that will wash it totally.