WD Smart Robot Car Chassis Kits with Speed Encoder

4WD Smart Robot Car Chassis Kits for arduino with Speed Encoder Features: 4WD Robot Car Kits For arduino Model Number:4WD Robot Car Kits For arduino Place of Origin:China (Mainland) Car size: Trolley width of the distance to the outside of the two wheels 155MM The trolley length for 260MM Shipping list: 2 car chassis Motor wheels 4 Velocimetry code disc 4 Fasteners 8 An assembly drawing A number of screws and nuts