Made by Revell, renowned makers of authentic model kits and die-cast vehicles for over 60 years, these are the most advanced, customizable remote-controlled car kits available. The 1:24 scale replicas have independent front suspensions that can be modified with three sets of springs with different tensions, allowing you to adjust the cars' handling for hairpin turns or straight-away racing. You can configure them for rapid acceleration or higher top-end speed by changing the pinion gears, or you can install a 9,000-rpm or 20,000-rpm motor, and the cars come with two sets of tires--slicks and treads--allowing you to decide which is appropriate for different racing surfaces. The digital-proportional remote has steering and acceleration trim that adjusts before or during use, providing the precise control to perform doughnuts and drift. Includes three pinion gears (6, 8, and 10 teeth), four different frequency crystals to allow racing of multiple cars, 12 AA rechargeable batteries, and battery charger. Ages 14 and up. Specify Dodge Challenger or Mustang GT. 8 3/4" L x 3" W x 2 1/2" H.