60m portable laser meter 1,Continuous Measurement,Pythagoras Measurement, Plane Area Measurement, Volum 2,simple use 60m portable laser meterPD-56 Technical Data Measuring Range0 ... 10m; 30mm at 40mAuto Power-off180sIlluminationAvailableContinuous Measurement,Pythagoras Measurement,Plane Area Measurement,Volume MeasurementAvailableAddition/SubtractionAvailableBattery life (Type AAA, 2×1.5V ...