... Plane Area Measurement, Volum 2,simple use 60m portable laser distance meterPD-56 Technical DataMeasuring Range0.05 ~ 60m (use target ... TypicalMinimum Reading1mmLaser ClassClass IILaser Type635nm, < 1mWDiameter of Laser Spot(at distance)6mm at 10m; 30mm at 40mAuto Power-off180sIlluminationAvailableContinuous Measurement,Pythagoras ... (Storage)0°C~ 50°C (Operation) 60m portable laser distance meter