Self-leveling in the horizontal plane, Locking mechanism protects inner pendulum during transportation, Manual-leveling in the vertical plane with 90 degrees split beam, Laser beam modes include dot and two adjustable line lengths, Visual and audible alarms when beyond leveling range, 40-6532 Kit Includes > Laser, NiMH rechargeable battery pack, 6.4V battery adapter, 4 "C" alkaline battery compartment (batteries not included), detector with clamp and 9V battery, remote control and 9V battery, tinted glasses, instruction manual with warranty card, hard-shell carrying case