Red devil horns headband is equipped with LED lights, powered by 3 replaceable button batteries (LR44*3), making them stand out in the crowd and enhancing the overall party experience; Note: batteries are not included. Measuring about 8.66 x 6.30 inch, the devil horns headband fits comfortably on both kids and adults; It is made of plastic, light but strong, not easy to break, providing a comfortable wearing experience.