The force is strong when you have this Star Wars Yoda Lightsaber Light-Up key chain accompanying your precious keys! Press the button to illuminate the green LED light on this miniature version of Yoda's Lightsaber that doubles up as a key chain! The key chain requires 3x "LR41" batteries which comes included! No, you didn't lose your keys, it's just someone playing those Jedi Mind Tricks on you again! Measures about 3-inches long. Ages 3 and up.