How do you play music etc. in an old camper with just a basic radio/cassette?

[Big Bill]

For about a tenner you can get a FM radio transmitter with an SD card interface as well as two USB interfaces a 2.1 amp one to charge your phone and another to inteface to a MP3 player etc. It plugs into the cigar lighter socket and aditionally provides hands free phone if you pair your phone to it. Mine has been working for many years because my 1999 Gulfstream only has a cassette player but does receive FM. You set-up the transmitter to any quiet frequency and then tune the radio to that frequency. the quality is excelent.