Bosch GLL 50 Operating/Safety Instructions Manual page 12

DO NOT use any optical tools such as, but not limited to, tele-
scopes or transits to view the laser beam. Serious eye injury could
result.
Stay alert, watch what you are doing and use common sense
when operating a tool. Do not use a tool while you are tired or
under the influence of drugs, alcohol or medication. A moment of
inattention while operating a tool may result in serious personal injury
or incorrect measurement results.
Use safety equipment. Always wear eye protection. Safety
equipment such as dust mask, non-skid safety shoes, hard hat, or
hearing protection used for appropriate conditions will reduce personal
injuries.
Magnets
Keep the tool, L-bracket (16), BM 1 (21), laser
target (24), BM 3 (17), and magnetic rotating
mounts (19, 20) away from cardiac pacemakers.
The magnets of the tool and laser target plate
generate a field that can impair the function of
cardiac pacemakers.
Keep the tool, L-bracket (16), BM 1 (21), laser target (24),
BM 3 (17), and magnetic rotating mounts (19, 20) away from
magnetic data medium and magnetically-sensitive equipment.
The effect of the magnets of the tool and laser target plate can lead
to irreversible data loss.
Use and care
Use the correct tool for your application. The correct tool will do the
job better and safer.
Do not use the tool if the switch does not turn it on and off. Any
tool that cannot be controlled with the switch is dangerous and must be
repaired.
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