ZIPLEVEL PRO-2000B High Precision Altimeter with 75-Feet Cord and User Guide Replaces rotary lasers for faster, easier and more precise measurements and true one-person operation that allows setup/pack up in seconds Read level and elevations directly in digits without math, line-of-sight, distance error or factory calibration for up to a year on one 9V battery Setup ranges of 40 feet vertically (4 feet in HP) and 150 foot circle and unlimited differential leveling without math using built-in carry function Typical level precision (internal): 0.050 Inch (0.005 Inch HP); typical vertical accuracy (internal): 0.050 Inch (0.005 in HP) or 0.15% reading 16 Powerful built-in functions plus PC serial port and 6 different measurement scales including inch, feet centimeters and meters