High strength robot tank base: The tank chassis was upgraded from yellow to more metallic gold, and the motor and motor cable were updated to make it more high-quality and durable. This is an agile tracked chassis, low noise and easy to control, which is a good partner for you to learning robotics.The robot chassis uses high strength aluminum alloy which makes it extremely solid and durable. Nice damping effect: The track is made of engineering plastic that basically assured the good elasticity, excellent damping effect and large road grip of the product. What s more, The high speed motors and premium tracks also allows it to move swiftly everywhere.