-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).
-Switch knob clockwise to open the instrument, emitting a laser beam
-Turn the instrument, the laser beam toward goals.
-Gently adjust knob, find work orientation.
-When work is over, turn the switch knob counterclockwise, turn off the instrument.
-With light point designed, provide convenience for the construction.