The Bosch Three-Point Self-Leveling Alignment Laser features three-point plumb and level point projection. The laser accurately transfers and aligns level, plumb and 90 degree square points. The smart pendulum system self levels and indicates out of level conditions, as well as locks when switched off. The laser can attach with magnets, strap or threaded mounts. Includes a multipurpose attachment, mounting strap, recalibration wrench (3) AA batteries, pouch and carrying case. ADDITIONAL SPECIFICATIONS: Accuracy +-1/4" at 100 ft.; Range - Horizontal Points (up to): 100 ft.; Range - Plumb POints (up to): Upwards 30 ft. Downwards 15 ft.; Leveling Type, Range: Self leveling, up to +-5 degree; Laser Diode: Class 2, 635 - 670 nm; Mount Threading: 5/8" - 11 and 1/4" - 20; Power (3) AA batteries; Operating Temperature: 14 - 122 degree F; Dimensions: 4.1" x 3.1" x 1.6"; Weight: 1 lbs.