http://www.gearbest.com/car-audio/pp_267383.html finds a 7 dollar item that may not have good documentation (I didn't find any) so they expect folk to fumble around and figure out what works.

The problem is that not all phones can connect to this and play. On top of that it requires you to tune to the FM station that is shown on the display of the device.

Folks are often upset with this solution as it requires a lot of setup and playing on the usual phones requires the driver to look at the phone screen which could get you a ticket or distract you causing an accident.

I will not recommend such a thing.