Measuring accuracy: 0 /-3mm Unit: m/in/ft Measuring range (no reflector) : 0.03-40m (ht-180) Measurement time: 0.1-3 seconds Laser level: â?¡ level Laser type: 635nm, < 1mw Dust and water proof: OP54 Auto - off laser: 60 seconds Automatic shutdown: 480 seconds Lighting: white LED light Measuring reference switch: Yes Data cleaning: Yes Power display: Yes Signal strength indicator: Yes Data storage: Yes Continuous measurement (Max/min): Yes Plus/minus (distance/area/volume): Yes Area/volume/ticker measure function: Yes Lofting: Yes Key life: 1 million times Battery type and life: AAA alkaline battery (2* 1.5v) Product size: 118*54*27mm Weight: 81 g Operating temperature range: 0 and 40 Storage temperature range: - 20 to 60