• Electronic Self-Leveling Horizontal Rotary Laser System • Designed for outdoor use and simple set up • Electronic self-leveling in the horizontal plane • Electronically-controlled dual slope feature • Visual and audible alarms when beyond leveling range • Single speed rotation 700 RPM • Slope operation function allows user to perform slope 8 degrees in both x and y axis • Height of instrument (HI) alarm function ensures product accuracy • 40-6536 Includes > Laser, detector with clamp and 9V battery, multi-function mount, NiMH rechargeable battery pack, alkaline battery comparent (batteries not included), charger, remote control with 9V battery, tinted glasses, magnetic target, instruction manual with warranty card and a hard-shell carrying case