It’s like a little tricorder in the palm of your hand, and would make a great Father’s Day gift for the handy dad around your domicile. It’s a Bosch laser measure. You actually bounce a laser off things to take measurements. We live in the future! Where’s my jetpack?!?
Good! Let’s point it to the sky! Oops an aircraft…
http://www.fbi.gov/news/stories/2014/february/protecting-aircraft-from-lasers