Keyestudio Micro:bit Mini Smart Robot Car V2 Instructions Manual page 88

What will you see
Send the test code to micro:bit main board, then insert the micro:bit main
board into the car shield; connect a 18650 battery, and turn the POWER
switch ON.
The micro:bit robot will move forward along the black track.
Note:
1) The width of black track should be greater than the distance between
the two tracking sensors.
2) Do not test the robot in the sun. If appear problems during the test
process, try testing the robot in a rather dark environment.
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