The Tangle Sport Matrix Nightball Football provides hours of active fun, day or night. Not just a high-quality football, the Nightball contains special LED lights that illuminate the ball when thrown. Measuring 8-inches by 4.5-inches by 4.5-inches, the Nightball s larger size makes it easier for smaller hands to catch and throw. The faster the ball spirals through the air, the brighter the LED lights glow. Requires one non-standard battery (included). Suitable for outdoor use only.