The Burris Eliminator III Laser Riflescope 4-16x50mm has a built-in laser rangefinder that makes calculating targets fast and extremely accurate with just the push of a button. This scope combines a clear and accurate riflescope with a laser rangefinder, all in one package. Simply program your ammo, elevation and atmospheric condition into the scope before using and the built-in computer will calculate the trajectory of the bullet as you aim towards your target using a bright red illuminated dot. The rangefinder button is located on both the left and right sides of the scope for use by right or left handed shooters. The built-in rangefinder has a 1,200 yard capability when pointing at reflective targets and 750 yards when pointing at non-reflective targets.