This is a digital terrestrial television flat antenna and booster designed to be attached to windows, etc. Unused double-sided tape is attached to the back of the flat antenna. I used it propped up, so I didn't use the double-sided tape. The booster also requires USB power, so I didn't use it. I used these when I lived alone, but I don't need them anymore. Would anyone like them? I purchased these on a flea market site. I used them normally, but please understand that they are used.