Brand new and high quality. Mechanical structure, easy to install. This car has a tachometer encoder. It can be used for distance measurement, velocity. It can use with other devices to realize the function of tracing, obstacle avoidance, distance testing, speed testing, wireless remote control. Everything weight approx 200g Included: 4 AA battery box. 2 Gearbox Motor. 2 Yellow Wheel X 1 Universal Nylon Swivel Caster Wheel 1 Body Screws
