Our laser rangefinders are handheld and easy to operate. The distance is measured accurately. With the function of measuring area, volume, addition, subtraction. 30 pieces of data can be stored. Perfect for an interior makeover or a great gift. Specifications Model AR50 KE40S KE40/50/50/60/80/100/120 ZL5070/100/120 Working Range 50M 40M 40/50/60/80/100/120 50/70/100/120m Laser color Red Red Red Red Bubble level 1 bubble no 2bubble 1 bubble Electronic Angle sensor No No No No Reference point 2(rear, front) 2(rear, front) 2(rear, front) 2(rear, front) Accuracy 2mm 2mm 2mm 2mm Continuous measure Yes Yes Yes Yes Area measure Yes Yes Yes Yes Volume measure Yes Yes Yes Yes Pythagorean measurement Full mode Yes Yes Full mode Unit options meter / inch / feet meter / inch / feet meter / inch / feet meter / inch / feet Add and subtract measurement Yes Yes Yes Yes Working temperature 0C~40C 0C~40C 0C~40C 0C~40C Storage temperature -20C~60C -20C~60C -20C~60C -20C~60C Storage humidity 20%~80% RH 20%~80% RH 20%~80% RH 20%~80% RH Min/Max value Yes Yes Yes Yes Self-Calibration Yes Yes Yes Yes Laser level II II II II Laser type 630-670nm,<1mW 630-670nm,<1mW 630-670nm,<1mW 630-670nm,<1mW Max storage 99 units NO 99 units 30 units Automatically cut off laser 20s 20s 20s 20s Automatic shutdown 150s 150s 150s 150s Battery 2x1.5V AAA(not included) 2x1.5V AAA (not included) 2x1.5V AAA (not included) 2x1.5V AAA(not included) Buttons/keys sound Yes NO Yes Yes 1*Laser meter 1*User's manual 1*Laser meter 1*User's manual 1*Laser meter 1*pouch 1*User's manual 1*Laser meter 1*pouch 1*User's manual Pictures for AR50 Pictures for ZL100 Pictures for KE40S Pictures for KE40/50/60/80/100/120