Technical data: Laser diode 635 - 650 nm Working temperature -10 - 50 ° C Storage temperature -20 - 70 ° C Laser class 2 Working range 20 m Working range with receiver 50 m Leveling accuracy ± 0.3 mm / m Self-leveling range ± 4 ° Laser point working range, max. 10 m (top) 10 m (bottom) Dust and splash water protection IP 54 Power supply 4 x 1.5 V LR6 (AA) Operating time, max. 18 h (Li-Ion) and 10 h (4 x AA) in cross line and point mode 35 h (Li-Ion) and 16 h (4 x AA) in cross line mode 50 h (Li-Ion) and 25 h (4 x AA) in line and point mode 70 h (Li-Ion) and 32 h (4 x AA) in line mode 70 h (Li-Ion) and 32 h (4 x AA) in point mode Tripod thread 1/4 " Weight, approx. 0.6 kg Laser line color: Red Projection: 2 lines / 2 points Lead point accuracy: ± 0.7 mm / m