Firejewel LED Crystal Cube Necklace - Violet *NEW* Elegant Crystal Cube made with Swarovski Elements! Inside Cube is an actual LED light showcasing this beautiful Crystal! 3 LR41 Batteries included in clasp, easy to change and replace! Magnetic clasp makes it easy for everyone, Switch barrel clasp around to turn necklace on or off!! All Necklaces 17" long!