No special settings required, outside of what you do to print TPU normally.
I did 3 walls, 15% infill, with 95A TPU.
The slicer setting “Avoid crossing perimeter walls” is helpful if you have issues with TPU stringing.
I prefer to insert the AirTag with the battery cover on the inside, to avoid it accidentally opening. I also prefer to face the AirTag opening towards the inside of the collar. Safety first!
The author marked this model as their own original creation.