Nokia OZO camera Manual page 30

Ventilation Ventilation
Do not cover the ventilation opening (A).
The Device is cooled by air flowing between
the outer and inner structure.
Keep the device ventilation upright (B).
Covering the opening or mounting the device
in a way that the openings are not vertically on
top of each other would prevent the air from
flowing.
Overheating Overheating