New Avoidance Tracking Motor Smart Robot Car Chassis Kit Speed Encoder Battery Box 2WD 4WD Ultrasonic Module for Ardino

Description 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 system is highly integrated 4 Car shop with L298N driver module four tracking module as well as 51 control unit seamless simple and good looking com ponents of the system Package Include 1 Smart Robot Car Chassis Kit 2WD4WD can be choosed