Green beam is 400% more visible than red beam, Electronically-controlled dual slope feature, Electronic self-leveling horizontally and vertically, Laser beam modes include dot, two adjustable line lengths and two rotational speeds, Two rotational speeds: 200 and 500 RPM, Visual and audible alarms when beyond leveling range, Height of Instrument/Tilt alarm function ensures product accuracy, 40-6544 Kit Includes > Laser, NiMH rechargeable battery pack, alkaline battery compartment (batteries not included), 6.4V battery adapter, remote control with 9V battery, wall/ceiling mount, tinted glasses, target, instruction manual and warranty card, hard-shell carrying case