Try an fm transmitter?
Plug it into a 12v socket (cigarette lighter socket) and plug the audio cable into the headphones jack. Tune the radio to the set frequency. Bob's your uncle.
https://www.amazon.com/s?k=fm+transmitter+for+car&crid=XYUJ3...
Plug it into a 12v socket (cigarette lighter socket) and plug the audio cable into the headphones jack. Tune the radio to the set frequency. Bob's your uncle.
https://www.amazon.com/s?k=fm+transmitter+for+car&crid=XYUJ3...