Specification overview Laser diode 635 nm, < 5 mW Operating temperature -10 – 50 °C Storage temperature -20 – 70 °C Laser class 3R Working range 60 m Working range with receiver 300 m (Diameter) Working range without receiver 60 m (Diameter) Accuracy ± 0.1 mm/m Self-levelling range ± 5° (8%) Levelling time 15 s Dust and splash protection IP 54 Rotation speed 150, 300, 600 rpm Power supply 2 x 1.2 V HR20 (D) (9 Ah) , 2 x 1.5 V LR20 (D) Operating time (max.) Rechargeable batteries (NiMH) 30 h Tripod thread 5/8" Weight, approx. 1.8 kg Colour of laser line red