Titan TTS2 Manual page 5

Warnings:
It's dangerous to use Class 3R Laser instrument improperly.
Precautions:
In order to avoid causing damage, the proper precautions should
be taken for you and control well the distance (in accordance with the
standard "IEC60825-1:2001") that may occur hazards.
The following is the main part of the explanation of the IEC
Standard Publication:
Class 3R Laser Products are used in outdoors and on building
site (with non-prism measurements).
The personnel who are specially trained, qualified and
authenticated are allowed to stall, adjust and operate these laser
instruments.
b. Set up corresponding laser warning signs in the use of area
range.
c. Prevent anyone from looking directly into laser beams or
watching the laser beams with optical device.
d. In order to prevent laser damage to people, the laser beams
should blocked at the end of the working route. In the limited area (★
Hazardous distances) where the laser beams through ,the laser beams
should be terminated when there are some activities.
e. the route which laser beans through must be set higher or
lower than the sight of people.
f. When the instrument not in use, please make it safekeeping
and storied. Unauthorized person should not use it.
g. To prevent exposure to laser beam accidentally, such as
mirrors, metal surfaces, windows, be careful as the flat surface of the
mirror and concave mirror.
*The hazardous distance refers to the maximum distance which
is from beginning of the laser beams to the laser beam weaken until it
does not harm people. The built-in rangefinder products equipped
with Class 3R/IIIa laser whose hazardous distance is 1000 meters
(3300feet),and in the distance, the strength weakens to a Class 1 laser
(sightseeing beam eyes couldn't hurt).
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