Bust Up the Opposition! This plastic Mini 4WD model assembly kit is a premium relesase of the Buster-Sonic, fourth machine used by hero Retsu Seiba in the popular Mini 4WD cartoon "Let's & Go!!" The stylish and compact Buster-Sonic body shows cut-off fenders and parts depicting a front suspension unit, with a rear wing and distinctive stay drawing the eye to the back of the car. The body comes molded in white and can be decorated with the metallic stickers included in the kit. This Mini 4WD model is based upon the aerodynamically-efficient AR chassis, which is molded in metallic gray-colored resin and features red under panel and diffuser parts. Yellow 5-spoke wheels are matched with large-diameter slick tires. AR Chassis The AR chassis is designed to offer its driver durability, customizability and ease of maintenance, all of which are vital ingredients for a successful Mini 4WD racer. Its aerodynamic form smoothly allows air to pass through the chassis interior as the machine runs, performing the vital function of cooling the batteries and motor and extending their effectiveness. The air intakes on the chassis and body are integrated for optimal performance. This high-speed racing chassis also features low-friction plastic bearings to ensure that any loss of power from the engine to the wheels is minimal in nature. The underpanel and diffuser can be removed from the model without taking off the body, while a low-friction rear skid bar is fitted to slash time loss experienced on tricky slope sections, and keep the racer on the track where it belongs. Features a 4.2:1 gear ratio. Specifications ★Length: 155mm ★Width: 97mm ★Height: 44mm ★Includes motor ★Snap-together easy assembly Separately Required Items ★R6/AA/UM3 batteries (x2)