Shelly BLU Button 1 holder (flush-mounted box)

Holder to mount a Shelly BLU Button 1 onto a flush-mounted box common at least in Germany.

May be also used to mount on any flat surface - but not optimised therefore.

Better use my other model for this: https://www.printables.com/model/1089759-shelly-blu-button-1-wall-mount

Two small screws needed.