Flixx Pins use electroluminescence to create a radiant display of pulsating light on any piece of clothing! A micro battery pack easily attaches to clothing, backpacks, hats, and more. Each flixx pin attaches via 3 small stick-pins that you push through your shirt or material. Uses 2 easily replaceable CR2032 batteries (included). Flixx pins are approximately 4", depending on design.