Stanley Laser Distance Measurer 30M Laser Distance Measurer STHT77100-0About this Item:Triangular area calculation to provide angle measurementArea, Volume and Pythagoras calculations - Product versatility for a wide range of applications30m working range.~ 3mm accuracy per 10m. Calculates distance in Metric and ImperialPythagoras indirect height function to measure distance when points aren't accessible to measureTPE overmould for secure grip and slip protectionThis laser distance meter can calculate area and volume and an additional triangular area functionDust And Waterproof Resistant As Per IP65 Standards.