The KS 3P is ideal for one person leveling, plumb, and simple layout. Projects plumb up and down laser points and a horizontal laser point. ±1/4-in at 100-ft (3mm at 30m) leveling accuracy Up to 100-ft (30m) working range Small, compact design Bright, Highly Focused Laser Points Self-Leveling Spot Beams up to ± 6º Easy access battery compartment Includes UM1P Multi-Mounting Device for quick positioning of the laser beams. Accuracy: ± 1/4-in at 100 ft (± 6 mm at 30 m) Operating Range: 100 ft (30 m) dependent on illumination of work area Power Source: Four (4) AA Alkaline Batteries Run Time (typical): 8+ hrs of continuous use Dimension: 4.13 x 1.65 x 2.95-in (105 x 42 x 75 mm) Weight (no batteries): 0.6 lb ( 0.27 g)