Our Green Cross Line Laser provides 8+ hours of runtime for all-day brightness and is powered by (4) AA batteries. The high-intensity laser beams allow our users to see the green lines up to 100' for fast and accurate leveling and alignment. Features 8+ Hours of Runtime High Intensity Green Amplified Rare Earth Magnets - Slide Resistant 100 ft. Working Range 165 ft. Range with Detector Accuracy: +/- 1/8" @ 33 ft 1/4-20 Thread Mount Locking Pendulum Self Leveling: +/- 4° Tilt IP54 Rated: Water and Dust Resistant 1m Impact Resistance Includes (4) AA Batteries 2 Year Tool Warranty