3 wheel smart robot carchassis diy kit speed encoder w/ battery box 2 motor1:48description:intelligent car chassis tracing car robotcar chassis with code diskideal for diythis car is the tachometer encoderwith a 4 aa battery box and power switch.(batteries not included.)can be used for distance measurement,velocity. Can use with other devices to realizefunction of tracing, obstacle avoidance, distance testing, speed testing,wireless remote control.

3 wheel smart robot carchassis diy kit speed encoder w/ battery box 2 motor1:48description:intelligent car chassis tracing car robotcar chassis with code diskideal for diythis car is the tachometer encoderwith a 4 aa battery box and power switch.(batteries not included.)can be used for distance measurement,velocity. Can use with other devices to realizefunction of tracing, obstacle avoidance, distance testing, speed testing,wireless remote control.

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