This is a 15 pack of round Sphero BOLT robotic balls, powered by the Sphero Edu app. BOLT was built to shine with an animated 8x8 LED Matrix that displays real-time data and advanced sensors like its gyroscope, accelerometer, and infrared communications. The BOLT Power Pack lets you charge, store, and carry 15 Sphero BOLT robots at once. It includes an integrated cooling system. The package includes Turbo Covers, Maze Tape, and Protractors. Learn more at https://store.sphero.com/products/sphero-bolt-power-pack.