"Ziplevel Precision Altimeter, Model# PRO-2000"

"Replaces or supplements rotary lasers and builders levels. Ziplevel sets up quickly and easily, allowing true 1-person operation. Levels and reads elevations directly in inches, feet or meters. NO rods, tripods, calculations or line-of-sight needed. NO error with distance, and NO factory calibration is ever needed. Applications include planning, designing, excavating, grading, foundations, landscaping, building, inspecting and repairing. U.S.A.1/10in. precision over set-up ranges of 40 vertical feet across a 200-foot circleMeasures over unlimited ranges without calculationsJobsite rugged16 built-in functions with PC portZero anywhere within rangeOperates from -22°F to +158°F for months of daily use on one 9V batteryU.S.A.Model PRO-2000"