The Lynxmotion Viper Sumo Kit (no electronics) is built by high-strength laser-cut lexan structural components and heavy-duty structural brackets. There is 12vdc gear head motors with 30:1 gear reduction is included. The robot needs a dual motor controller and a RC set for remote control operation. This kit includes the bullet proof laser-cut lexan, aluminum reinforcement bars, mechanical hardware, two 2-7/8" wheels and hubs, two gear head motors.