The LEDs on this amazing cross flash red on the ends, then yellow towards the middle, and a powerful blue in the center for a total of 9 LEDs. Synchronized flashing technology produces an incredible effect! The light is powered by long-lasting CR927 Lithium batteries (included). There is even a small loop on the top where you could attach a string (not included), or use the strong magnetic back to attach these to your clothes, ears, or anywhere. Great for church fundraisers, concerts and more.