NORAUTO SOUND NS-228 BT Manual page 170

Keep the volume at a suitable level� Excessive volume may
prevent you from hearing noises from your surroundings, which
may result in a risk of accidents�
Ì Prolonged exposure to high volumes (especially with
headphones) can damage your hearing� Avoid setting the
volume too high or using the unit for too long�
Maintenance
Cleaning the unit: Wipe off the dirt on the panel with a dry silicon or
soft cloth� Failure to observe this precaution may result in damage
to the monitor or unit�
Cleaning the connector: Wipe off dirt on the connector of the unit
and faceplate� Use a cotton swab or cloth�
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