Bosch 360 Degree Three Plane Leveling Alignment Laser GLL 3-80 VERSATILE: Generates three 360 degree laser planes  one horizontal and two vertical  for level, plumb and square applications CONVENIENT: Includes Smart Pendulum System that allows laser tool to self-level while also indicating out-of-level condition to help ensure an accurate measuring. Manual mode locks laser lines at any angle PRECISION: The Bosch GLL 3-80 is great for marking, alignment, and indoor leveling with a range up to 65 feet on its own. Also features Pulse Laser Receiver Mode for use with LR2 laser receiver at up to 265 feet in bright conditions SECURE: Smart Pendulum Leveling System ensures secure transport by locking and protecting pendulum when unit is switched off SELF-LEVELING: Since this laser is self-leveling, so operators no longer need bubble levels and plumb bobs Class IIa laser product, 1mW power output