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10
Precautions
Do not expose the set to direct sun radiation. Especially in cars it may suffer
from excessive heat during the hot summer months. Do not position the set in
the direct vicinity of radiators and protect if from humidity. Proper operation is
ensured between 0
0
and 40
0
C.
Only use a piece of soft cloth and a mild detergent solution for cleaning, but never
any chemicals, benzene etc.