Solar Powered Race Car. Maximum Speed: 10 ft./second. Climb Up Hill: 30 Degree. 8.3 inches long X 3.1 inches wide. Solar Panel: 2.5V *150mA; Solar Panel: 2.2*2 inches 8.3 inches long *3.1 inches wide Maximum Speed: 10 feet/second under sun shine Climb Up Hill: 30 Degree Assembly required with easy instruction