HEDÜ R1 Mode D'emploi page 12

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Laser radiation
Do not look in the laser
beam even not if you have
optical instruments.
Working temperature
R1 and R2 with red laser beam:
-20°C to +50°C
R2 with green laser beam:
0°C to +40°C
Protection against rainwater
In the horizontal operation on a tripod the
device is sufficiently protected against
rainwater.
Only R2: In the vertical operation the device
is not suitable for the use in the rain.
The device has to dry before you put it in the
case.