TECHNICAL DATA Accuracy ±0.12 in at 33 ft Max. operating distance (diameter) 66 ft (lines), 197 ft (lines, with receiver) 1 Maximum operating time 14 h Battery type 4 x 1.5 V (AA) Self leveling range at room temperature ±4 ° Self leveling time 3 s Horizontal fan angle 180 ° Vertical fan angle 135 ° IP protection class IP 54 (EN 60529) Laser type Line