http://tinyurl.com/kg3z4a9<P>Johnson Level and Tool 40-6580 Dual Grade LaserProduct Review<P> Click on the link for more reviews<P>Large � 5� electronic auto-level range. When beyond the leveling range, the laser beam will fl ash, rotation of the beam will stop, and an audible alarm will activate<P>Electronic beam shield to turn the laser beam off in one to three quadrants, when multiple lasers are being used<P>Programmable dual slope operation function allows user to perform slope at different<P>Inclinations in both x and y axis<P>Height of Instrument/Tilt alarm function ensures product accuracy<P>
