I had a “Guudgo wireless doorbell with socket” which is actually pretty decent in terms of functionality, except the button came with a sticky pad for mounting.
Since the button needed to go outside (on a fence), I've designed this custom mount.
It works with M5 screws (their length depends on your fence's thickness, I used M5x30). Put the doorbell inside the mount, lay it over the fence, tighten with the two “flanges” after inserting the captive nuts.
Just in case you have another similar doorbell with a different brand name and you do not know if this one will fit: my doorbell button is 72x40x20 milimeters in size.
The author marked this model as their own original creation.