My trailer came with the heated mattress and the controller, but neither was mentioned during the PDI walkthrough. I found the controller in a drawer after we got home and I had to google the brand/model to figure out what it was!
Thought it was cool at the time, but we have never used it.
2003 F150 Supercab 4x4, tow pkg, 3.55 gears
2020 Flagstaff Micro Lite 21DS