Details: All essential functions in a compact package Length measurement, area and volume calculation, intuitive operation Large display three backlit lines for perfect visibility Memory function allowing easy access to the last 10 measurements Robust shockproof case, protection class IP54 (water splashes and dust ) Reliable measurement results under all circumstances, in accordance with ISO certification Features: Laser diode: 635 nm , < 1 mW Measuring range: 0.15 40 M Laser class 2 Measurement accuracy, typical +/- 1.5 mm Average measurement time < 0.5 s Maximum measurement time 4 s Power supply 2 x 1.5 V LR03 (AAA) batteries Automatic switch-off 5 min. Weight 0.09 kg Length 105 mm Width 41 mm Height 24 mm Units of measurement m/cm , ft/inch Battery life, individual measurements approx. 5,000 Water and dust resistance IP 54 Protection against shocks up to 1 m