Set of 25 Assorted Round Blinking LED Clip On Pins Contains 25 Flashing Round LED Clip On Pins in an Assortment of Colors Great for Arts & Crafts Projects, DIY Light Up Decorations & More Use Them as Buttons on a Shirt, Earrings, Lapel Pins- The Possibilities Are Endless All products are CPSIA Compliant Includes Replaceable Low Mercury Batteries