Hiwonder 4WD Chassis Car Kit with Aluminum Alloy Frame, TT Motor Smart Robot Car KitProduct Description The kit includes a 4WD chassis, a extension bracket, four rubber tires and four TT motors. There are many holes for loading various sensor modules and motors to create your smart car. The ratio of the chassis car motor is 1: 120, and output voltage is 36V. Compared with ordinary cars, its torque is stronger and the carrying capacity is greater! Feature The structure is simple for quick installation Intelligent robot car with 4 TT