Becker 4720 traffic pro User Manual

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the volume of signal tones (e.g. storage confirmation) can be 
set using this function.
For selection, request user menu. By pressing multifunction 
button 
 request the second plane of the user menu. Press 
the 
 multifunction button. Using the right rotary 
control
 select either 0   (quiet) or + 5  (loud).
The setting is stored automatically.
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