DEWALT DW03101XJ 100M BLUETOOTH LASER DISTANCE MEASURE Common enduser functions linear meter readings surface and volume calculations It will add or subtract readings and calculate distance in Metric and Imperial The user can select the unit to continually measure which allows layout applications Pythagoras indirect height function will allow to measure distances even when point A andor point B isn&rs accessible for linear measurement Triangular area calculation to provide angle measurement Integrated inclinometer Can be used as a digital level calculate indirect height values or indirect horizontal distances Unit stores last 20 measurements The unit has large raised oversized buttons to avoid miss measures Large backlit 3 line display to provide visibility in all working conditions Multifunctional end piece Delivers versatility and accuracy of measurements in corners and vertical surface The unit has a flat base that gives a solid platform to measure without the unit shaking and moving to help avoid measuring errors Will survive a 2m drop onto concrete and has an IP65 waterdebris resistance Comes complete with two AAA battaries