4WD Robot Chassis Kit Smart Off-Road Car Kit Robot Car Aluminum Alloy Chassis Mobile Robot Platform Withcoded Disc 4 DC Motor with Speed Encoder Wheels for Raspberry PI, Arduino Robot Projects 4WD Robot Chassis can be used with other devices for tracking, obstacle avoidance, ranging, speed testing, wireless remote control, and more. 4WD Robot Chassis is equipped with installation drawing data, easy to install, and various holes are reserved for easy installation of various sensors. 4WD Robot Chassis aluminum alloy material of the robot chassis is light in weight, high in strength and non-deformable. 4WD Robot Chassis can be equipped with a variety of controllers, drives, sensors and RF modules. 4WD Robot Chassis Off-road tires have shock absorption, wear and grip, and can be adapted to flat roads and rugged roads.