The model car body uses a zinc alloy shell, a plastic chassis, rubber tires, and is free of formaldehyde and other dangerous materials, making it extremely safe and significantly enhancing the safety of young people! Function: The car can move forward for a predetermined distance when using the pull-back function, which does not require a battery. Pull it back and release it. Present: An excellent choice for a child's birthday, Christmas, or New Year's celebration, this sturdy and exquisitely crafted model car makes a wonderful present.