I included this under another forum, but thought I would put it under its own for others also because I love it so much.
I bought for around $30 a Bluetooth audio receiver and I plug it in the sound system then connect my phone by Bluetooth, then I can control what I listen to remotely by my phone and listen to whats on my phone, or Pandora on my phone. I do this for inside the rig and I really love it for when I am outside and turn the outside speakers on and can control it all by my phone.
Ford Western Hauler
2013 CC 36B4