Maximum measuring distance: 40 meters; Continuous measurement: +/- 1.5mm; Measurement unit: mm / in / ft; Continuous measurement function; Measurement of area function; Volume measurement function; Measurement via pythagorean theorem functional: full mode; Add and subtract measurement; Maximum / minimum; Maximum storage: 99; With blacklight; With key click prompt tone; Housing protective grade: IP54; Laser type: 2 level 653nm <1mW; Auto cut off laser: 20 seconds; Auto power off: 150S; Storage temperature: -20'C~60'C; Working temperature: 5'C~40'C; Powered by 2 x AAA batteries (included)