Sony XAV-701HD - Manual (Page 33)

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Volume settings
Start-up settings
Set clock
Voice settings
Tap this button to set the type of spoken directions and other route
instructions your TomTom navigation module will read aloud.
Volume
settings
Tap this button to set the volume level for your TomTom navigation
module. Move the slider to change the volume.
Start-up
settings
Tap this button to set what happens when your TomTom navigation
module starts.
Set clock
Tap this button to select the time format. As soon as you have a GPS fix,
the time will be set automatically. If you don’t have a GPS fix, you can
choose to set the time manually.