Bosch GLL 12-22 Professional Line Laser Rubber-enforced housing with IP55 dust and waterjets protection for withstanding rough conditions Integrated rotation mount for fast and stable mounting and for protection during storage and transportation Flexibility thanks to Dual Power Source technology: 2x AA alkaline batteries or separately available BA 3.7V 1.0Ah A Professional Additional data Dust and splash protection IP 55 Working range, value 12 m Accuracy ± 0.8 mm/m Colour of laser line red Laser diode 630 – 650 nm, 5mW Operating temperature -10 – 40 °C Storage temperature -20 – 70 °C Laser class 2 Self-levelling range ± 3.5° Levelling time 6 s Power supply 2 x 1.5 V LR6 (AA), 3.7 V Li-Ion battery (1000 mAh) Operating time (max.) 10 h Weight, approx. 0.35 kg Projection 2 lines