Sony NV-U44 Manual

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SONY NV-U44 (US,FR,ES)  4-000-805-11 (1)
2
US
 Touch to show the turn-by-turn list. (Only during route guidance)
 Touch to zoom in/out the map. 
Touch  / .
 Touch to adjust the voice guidance volume. 
Touch 
/
To turn off the sound, touch  .
 Touch to hide the map tool bar.