How stable is the beta so far? Are there lots of changes expected till it's not beta anymore?

@bardaf, the "Doorbell 1 tones" andt he others are only there if you've got Domoticz 2020.2, with Domoticz 2020.1 there are less devices recognized.

Just go to the switches page, press "learn light/switch" and press the doorbell. Then you know which one you should choose.
It's probably the Browse Siren.