HWR203
This instrument is equipped with the semiconductor diode with wavelength of 635nm(green:532nm, green:520nm), which the laser beam has supreme visibility. And the laser module of instrument will rotate freely to form a laser-scanning surface.
When the instrument is set upright, it will emit laser-beam to form a horizontal scanning surface and a plumb line automatically. When set horizontally, it will form a plumb scanning surface and a vertical line.