Suaoki 5-600P Manual Del Usuario página 9

The fog near the rangefinder would reflect the laser back to the device,
which cause the device to give a reading on the distance to fog. The fog
mode allows the product to filter out the influence of fog in close range
(d1=30m) and thus measure with improved accuracy.
2. LCD display:
Aim at target object and short press power button. Then, the distance value
will be displayed on lens.
D. Speed mode
1. Working Principle
v=(d2-d1)/t
Note: The range finder would take two measurements of distance, d1 and
d2. To get the average speed of a moving object, divide the distance
traveled (d2-d1) by the time taken to travel the distance (t).
2. LCD display
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