Self-leveling within +/-6 degrees, Interior horizontal and vertical layout, Locking mechanism protects inner pendulum during transportation, 360 degrees graduated base allows angle layout, Emits cross line lasers, Projects vertical and horizontal laser lines simultaneously, Visual out of level indicator, 5/8" - 11 thread, 40-0912 Includes > Laser, 3 "AAA" alkaline batteries, instruction manual with warranty card, soft-sided carrying case