TechniSat VIOLA 2 Instruction Manual page 14

In the event of extended transportation in the cold and subsequent moving to
warm rooms, do not switch on immediately; wait for the temperature to equalise.
Do not expose the device to dripping or splashing water. If water has penetrated
the device, switch it off and inform the Service department.
Do not expose the device to heat sources that will heat it up more than normal
use.
In the event of a thunderstorm, disconnect the device from the mains.
Overvoltage can damage the device.
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