This assembly kit creates the 4-Track Crawler, a model with 3-sided crawlers in place of the four wheels, that easily gets over uneven surfaces. ★Four crawlers swing forward independently, and the front axle rotates around the propeller shaft for powerful performance. ★Crawlers are composed of assembly type tracks, drive sprockets, and two road wheels. ★Includes everything needed for easy snap-fit/screw-together assembly. ★Comes with a type 130 motor. ★Requires two R6/AA/UM3 batteries (not included). ★Length: 200mm, width: 103mm, height: 100mm (measurements are approximate).