new avoidance tracking motor smart robot car chassis kit speed encoder battery box 2wd 4wd ultrasonic module for ardino kit Type:4WD Hoge zachtheid

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new avoidance tracking motor smart robot car chassis kit speed encoder battery box 2wd 4wd ultrasonic module for ardino kit Type:4WD Hoge zachtheidBeschrijving: 1. Mechanical structure is simple and very easy to install. 2. Car comes with 20 wire tachometer yards, with photoelectric gun shop can be quickly formed a gun systems. You can speed, distance, composed of closed loop systems. 3. Car with four on the 5th battery compartment, convenient to the entire system power supply. At the same time equipped with a swich, easy start stop system. Without additional very convenient, so that the whole