The DEWALT Combilaser Self Leveling 5-Spot Beam/Horizontal Line Laser Level projects five bright spot beams for precise plumb and horizontal point transfer. Accurate to 1/8 in. This laser also features a rear-projecting horizontal line which aids in additional leveling applications. It self-levels when within 4° of plane and the beam has an indoor visibility of 100 ft. The range of this handy leveling instrument can be extended to 165 ft. Projects down beam with raised clearance, providing laser-dot visibility and alignment for wall track layout. Integrated magnetic pivoting base with 1/4 in. Thread front and rear mounted magnets allow flush attachment to metal track and steel. Full-time pulse mode allows 165 ft. Locking pendulum helps prevent damage to internal components. Includes 3 AA batteries.