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*The hazardous distance refers to the maximum distance
which is from beginning of the laser beams to the laser beam
weaken until it does not harm people. The built-in rangefinder
products equipped with Class 3R/IIIa laser whose hazardous
distance is 1000 meters (3300feet),and in the distance, the
strength weakens to a Class 1 laser (sightseeing beam eyes
couldn't hurt).