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It is meant to be used with a separate FM transmitter device.
It acquires your approximate location and then launches the website www.radio-locator.com.
The web site provides a list of unused FM frequencies that you can use.
Collect song lyrics from popular web sites like chordie.com and ultimate-guitar.com.
Edit them to one on per measure, either on your phone or on a PC
Share with your friends to build a library of songs ready when you are.