Self-leveling - 5 dot laser accurate + 1/4"/100', Locking pendulum assures durability in transportation, Multi-functional magnetic base mounts to metal surfaces, Laser housing design allows fast and easy top and bottom track installation, Bright, bold dots assure enhanced visibility, Includes > Laser, multi-functional magnetic base, 3 "AA" alkaline batteries, mounting strap, magnetic target, instruction manual with warranty card, soft-sided pouch and hard-shell carrying case.