one can measure 15 cm to 15m, the rangefinder measuring about 12 cm itself.
the laser can target the targeted location which avoids deflect unintentionally.
clarification, which seems obvious once it is known, but the measure includes the rangefinder, you put it against a wall and you have the distance between the wall and what you are aiming, not between the nose of the rangefinder and target areas. ca avoids making calculations.
