Added a sound system a while back. Used a portable Bluetooth speaker, that links to my phone, which in turns links to a remote controller which is stuck on the dash. Means I can keep the phone in my pocket, and don't have to worry about unlocking it etc.
Here's the controller - has play/pause, skip forward/back and volume
![[Linked Image]](https://tm-img.com/images/2019/12/15/Bluetooth-Controller.jpg)
Speaker fits nicely behind the seat (and is branded with the world's greatest rock band

).
![[Linked Image]](https://tm-img.com/images/2019/12/15/Speaker.jpg)