Self-Leveling Crossline  Laser (4V 1H 1D)
●Beam: 1 horizontal line and 4 vertical line, forming cross at wall and ceiling,Plumb down-beam, with tangent screw
●Wave length: 635nm
●Operating temp: -10 °C~50 °C
●Leveling Accuracy: ±2mm/10m
●Vertical Accuracy: ±2mm/10m
●Working Range: Indoor, radius 10m:30m(with detector)
●Selt-leveling method: Magnetic damping system 
●Compensation Range: ±2°
●Power: 3X1.5 V batteries
●Laser flashing and buzzing when self-leceling over range