... . Battery operated and included.3. It is best choice for promotion gifts.4. Welcome your order.Sanso Plastic Electronic Co., Ltd ... producing and selling of glittery electronic products and some other promotion gifts. Our main products including flashing buttons, rings, necklaces, ... , ice cubes, flashing toys and some other festival gifts etc. Glitter Necklace, Led Glowing Necklace, Promotion Gifts