I GOT THIS FOR CHRISTMAS, AND I DON'T WANT TO STOP USING IT. ALTHOUGH IT'S REAL PURPOSE IS TO BE USED ON HOTWHEEL CAR'S IT IS HARD TO CLOCK IN THERE SPEED, BUT IT WORKS GREAT ON CARS IF YOUR WATCHING FOR SPEEDERS, PLAYING BASEBALL, OR EVEN RIDING YOUR BIKE OR SCOTTER. THIS IS A GREAT BUY AND I RECOMEND IT TO EVERYONE