I have had two different answers to this topic. The Facebook Ring team said the Dome Siren will not stop alarming unless it gets the turn off signal from the base station, which means, if the base station is destroyed, the Dome Siren will still alarm. However, the phone Ring team said otherwise. That the Dome Siren will no longer work if the base station is destroyed.
I would buy the Dome Siren if it stayed alarming after the destruction of the base station.