Check the listing for details. Professional Laser Level 5 Line 6 Point 4V1H Automatic Self Leveling Rotary. Condition: New. Listed at 89.95 USD. Professional Laser Level Measure 4V1H Product Features -High precision laser level, provides 5 laser lines (4 vertical and 1 horizontal), 6 points -360° rotating base with tuning knob, support full room layout -The dial can measure the angle of the ceiling and the ground -Within self-leveling range, the laser beam will flash when beyond the leveling range How to use: 1、Set the instrument on the tripod or a stable surface, adjust the instrument. If the instrument is too tilted, out of range (3 degrees), the laser tube will automatically turn off (or if audible alarm) 2、Switch knob clockwise to open the instrument, the instrument top green indicator light, while emitting a laser beam 3、Turn the instrument, the laser beam toward goals 4、Gently adjust knob, find work orientation 5、When work is over, turn the switch knob counterclockwise, and turn off the instrument Product Details