The most important data Performance data Operating temperature Storage temperature Laser class Working range Accuracy Self-levelling range Levelling time Dust and splash protection Tripod thread Colour of laser line Projection Plumb point accuracy -10 – 50 °C -20 – 70 °C 2 15 m ± 0.3 mm/m ± 4° 4 s IP 54 1/4", 5/8" green 2 lines / 2 points ± 0.7 mm/m