Programmable dual slope function allows user to perform slope at different inclinations in both x and y axis, Large +/-8 degrees electronic self level range, When beyond the leveling range, the laser beam will flash, rotation of the beam will stop, and an audible alarm will activate, Height of Instrument/Tilt alarm function ensures product accuracy, Operates with radio frequency remote control, LCD display with backlight illumination , Manual mode allows unit to tilt to extreme angles, Adjustable rotation speeds of 300, 600 and 1100 RPM, 40-6582 Includes > Laser, li-ion rechargeable battery pack, alkaline battery comparent (batteries not included), li-ion battery adapter, remote control with 2 "AA" batteries, detector with 9V battery and clamp, sighting scope, vertical bracket, fine adjusent plate, instruction manual with warranty card and a hard-shell carrying case