Glow In The Dark Hollow Stone Pendant Crescent Moon Glow Necklace Feature： Material: alloy (pendant), copper (chain). All our jewels do not contain nicke l and resolve any allergic reaction. Very elegant necklace, A beautiful matching necklace would be a perfect party for your dress. Gift gift for Christmas day, birthday, Valentine's day and the birthday of your girlfriend, wife and mother. Delivery: 1 x pendant with chain Please put the necklace where the sun shines, or UV light exposure continues for 5-10 minutes, then get a dark place, it can shine! The light will dim slowly, it will not turn on at night. So it will not light up, then it will light up in the sun or light exposure, then it will continue to shine! Can be used repeatedly. Package：1X necklace Necklaces & Pendants Brand new and durable