The idea is to have a cheap device always in your car with GPS and Bluetooth enabled. No need SIM nor WIFI.
This module is like a console to set near you where you can see the GPS data fields:
Besides, if the mobile have m2d manager installed and your main device as well and they are paired, if you install Voice for Notifications App, you will be able to read your notifications in m2d CAR.
Maybe more features in the future.
Soon at Google Play.