SBS TX-RX TRANSMITTER 3.5mm JACK black

This 15W car charger allows you to connect your smartphone to the car
radio wirelessly, even where the radio does not support wireless
connection. Plug it into a 12V cigarette lighter socket and pair your
phone. Using the integrated dial, set a radio frequency on the charger
and then tune the same frequency on your car radio. The charger will
then be able to connect to the radio using the FM frequency and all
the music broadcast from your smartphone will be played through your
car's speakers.