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