the manufacturer told me in an email to carry the instruction book with me when I go through security and said they would not confiscate the item, but I have not tried it yet -- I think the average TSA employee would think it was a small nuke and confiscate it and have you arrested. As expensive as it is, I don't want to lose it to some government yo-yo who doesn't have a clue -- besides, that assumes the TSA employee can read as well!