Features: These baseballs are made of leather materials, which can be charged in the sun. In order to get a better continuous luminous effect, please put the ball in the sun for a longer time or in a stronger light. Specifications: Material: Leather material. Main color: White. Size: Approx.7.2 cm/ 2.83 inches in diameter. Package includes: 2 x Baseballs (no battery and LED light).