This LCD Knob is intended as Adapter to screw on bottle caps from your favorite or most recent beverage.

Fits Caps used in my region. The thread seems standardized in the beverage industry, so should fit most central europe countries. 

Model is designed to print without support. 
No specific requirements for Material or infill.
Layer height needs to be detailed enough for the thread to be detailed enough. I printed mine in fine. Standard 0.2 might also work.
 

update1: printed one with “0,2mm quality” default settings in prusa slicer to check. Works fine.  Actually white (or in general same color as the housing) is nicer. Hides optically the lever. I like it more with lever - faster and guarantees no accidential button press clicks. picture added