Yahboom Smart Robot Balance Car with UNO STEM Robotics Education KitFeatures: 1. Designed based on UNO R3, the self balancing robot car kit is a fun and educational learning kit. 2. A perfect choice of master knowledge of PID(Proportion Integral Differential ) for a beginner, children, students and so on. 3. High precision motor with hall encoder, make it more superior, more powerful, safer. 4. The self balancing robot kit has multiple functions, such as balances with two wheels, and controlled by the Android APP. 5.