Measuring tools for indoor applications. 1.Measuring Range: 0.05-20m(long to 50m) 2.Measuring Accuracy: 2mm 3.Laser type: 650nm, < 1 mW, Class 2 4.Battery Type: AAA, 2 x 1.5V, up to 5000 measurements 5.Switch Off without activity within 3 mins. 6.Temperature range: -10C up to +50C 7.Storage Operation: -20C up to +65C 8.Dimensions: 110 43 24mm 9.Weight without batteries: about 65g 10.Warranty: 12 month 11. Other functions: Distance, Area, Volume, Continuous Measurement (only max.), Reference(2), Unit: m, ft, in, 00 00 Backlights