Review

http://tinyurl.com/kcypw8eProduct Review Click on the link for more reviewsReplaces rotary lasers for faster, easier and more precise measurements and true one-person operation that allows setup/pack up in secondsRead level and elevations directly in digits without math, line-of-sight, distance error or factory calibration for up to a year on one 9V batterySetup ranges of 40 feet vertically (4 feet in HP) and 200 foot circle and unlimited differential leveling without math using built-in carry functionTypical level precision (internal): 0.050 Inch (0.005 Inch HP); typical vertical accuracy (internal): 0.050 Inch (0.005 in HP) or 0.15% reading16 Powerful built-in functions plus PC serial port and 6 different measurement scales including inch, feet centimeters and meters