Vertical alignment of pipes Levelling electric sockets, cable trays, radiators and pipe installations Levelling and aligning doors and windows Vertical side fan angle 240 ° Accuracy ±2 mm at 10 m Automatic switch-off Yes Battery type 4 x 1.5 V (AA) Dimensions (LxWxH) 124 x 124 x 187 mm IP protection class IP 54 (IEC 529) Laser class < 1 mW, 635 nm, Class 2 (IEC 60825-1:2008), Class II (FDA CFR 21 art. 1040) Laser functionality Square, Level, Align, Plumb Laser line width at 5m distance < 2 mm Low battery indication Yes Operating temperature range -10 - 50 °C Operating time with alkaline battery 8 h Out-of-level warning Yes Plumb type Plumbing and additional horizontal and vertical alignment Self-levelling range at room temperature ±3 ° Tripod thread diameter 1/4 in, 5/8 in Weight with batteries 990 g Horizontal fan angle 180 ° Vertical front fan angle 140 °