The biggest difference between working outside versus inside with a 
		laser level is that outside, in sunlight; the human eye cannot see the 
		laser beam of light. 
		When you are working outside with a laser level, 
		you will need to use a Line laser level 
	Detector. The Line laser level Detector detects the laser by reading the 
	light as it pulses in the area.
		
        
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