Harman Kardon GPS-310 Quick Start Manual page 10

Text to Speech Feature
GPS-310 has a feature called "Text to Speech" in which navigation prompts that
appear on the screen as text can be configured to be spoken in one of several
voices (male or female). You can choose to have only directions announced or
both directions and street names. For example, the voice would say: "In 500 feet,
turn left on Lincoln Blvd. "
1
Choose
"Navigation
Settings"
2
Choose
"Sound
Settings"
3
Choose
a voice
profile
Finished!
GPS-310