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Display size is only 18mm in height.
System power has to be connected to rear lamp power.
System power on when driving gear engaged to (R).
When Car is in reversing and rear obstructions closed to 2.0m,
Digital meter will start to show distance, when it close to 1.5m, system buzzer
will issue alert to remind driver.
Left & Right waves will show distance in 7 stages.
Buzzer sound can be turn off.
Alert in 4 stages with different BB speed sound.
1.5 m : B….B….B….B
1.1m : B...B…B...B...B
0.6m : B . B . B . B . B . B
0.4m : B B B B B B B B B
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