I'm thinking it will be a 1 time item, and it will nuke all the ghosts in your Springfield at the time of release. I think that's why there was something for a "box of bombs" I saw somewhere. Either in the Halloween premium guide or somewhere. So since there's an option for a "box", I imagine it's a 1 time use and you can buy more (likely for donuts). Since it seems to be a premium tool, it'd have to have a better radius than the vacuum, which is everything entering your current screen of vision.