2WD Avoidance Tracking Smart Robot Chassis Car Kit With Speed Encoder Ultrasonic ForUNO R3

Feature With simple mechanical structure is very easy to install Comes with 20 wire tachometer yards you can speed distance composed of closed loop systems Here is the manual for your reference only Chinese Package includes 1 x Car chassis2 x Car Wheels2 x DC Gear Motor2 x 20 line code disk4 x Fasteners high intensity black acrylic 1 x Caster1 x Four battery box1 x Quality Rocker Switch1 x V5 shield1 x UNO R31 x SG901 x FPV1 x L298NSeveral screw nut