The A2S is a servo leveled slope laser for grading, excavating, and pipeline contractors. Align the laser, dial in the desired slope, press the power switch, and the laser will drive itself to the grade you selected. The AS2 matches accuracy and long range with other lasers costing thousands of dollars more. Slope capability: 0-25% (NEW AS of APRIL 2005) in increments of .01%, Accuracy: ±.080" @ 100', Range: 1000' radius (2000' diameter) with R7 receiver, Power: 115 hour run time on 4 C alkaline batteries. (Rechargeable batteries optional), Compound slope capability with optional S1 adaptor. Water and dust resistant. 3 year warranty. A2S$1,795.00 S1 Compound Slope AdapterThe S1 Adapter is used with the L1-AS, L1-AS Magnum, and AS2 slope lasers and allows the user to shoot dual grades, (where slope is required on the x axis and y axis). A chart provides the proper slope to dial into the laser, and the number of degrees to rotate the laser. The adapter allows the user to precisely rotate the entire laser to produce the desired slopes on the x and y axis. S1$50.00 Rechargeable NiMH Battery Kit - 500-0250MIncludes charger and 4 C NiCd rechargeable batteries 500-0250M$60.00