This is a hollow tower that relays, sends, and receives transmissions. It took me 30 min. to build. It is directed to Star Wars. It is about 9 in. tall and 6 in. wide. And I can assure you that this set is all LEGO and that all that disagree, you very wrong. Please comment, rate, and post suggestions with this set, it will be greatly appreaciated. Come back again!!!