Self-leveling, Projects five self-leveling beams simultaneously, Locking mechanism protects inner pendulum during transportation, Visual and audible alarms when beyond leveling range, Laser can be rotated 360 degrees when attached to magnetic laser mount, 40-6680 Includes > Laser, multi-functional magnetic base, 3 "AA" alkaline batteries, mounting strap, magnetic target, tinted glasses, instruction manual with warranty card, soft-sided carrying case