Laser Distance Meter Bubble Level Handheld 1.6-inch LCD Diastimeter Pythagorean Mode Measure Distance Area and Volume - 60m ?Basic Functions: the laser distance meter includes functions of single measurement, Max./Min. measurement, continuous measurement, area/volume/Pythagoras measurement, addition and subtraction ?Historical Data Storage: can store up to 20 groups of the measured value for further analysis and reference ?Measurement Reference Switching: the default setting is rear edge measurement, you can change it to the front measurement reference. ?Measurement Units: easy to switch among m(default), ft, in ?Low Power Consumption: powered by 2pcs 1.5V AAA battery (not included), with battery indicator. 180s instrument automatic switch off, and 30s laser auto-off, both are power saving Specifications: ?Material: ABS ?Measuring Accuracy(standard deviation): ?��2.0mm ?Measuring Unit: m, ft, in ?Area Unit: m2, ft2 ?Laser Type: 620~690nm ?Laser Class: Class II,