You can choose between stand-alone and radio smoke alarms
The smoke alarm obligation for new and existing buildings now exists in all German federal states.
Depending on how it is regulated in the countries, tenants, landlords, building owners or other persons are responsible for installing the small life savers.
The fact is: Since the introduction of the duty, the number of fire victims has dropped significantly*. It is also important to know that most people die from the fumes rather than the fire. Because while you sleep, only your hearing is still awake. That's why all smoke sensors beep so loudly. So that you really get it.
*Federal Statistical Office/Economy Week, survey "Change in fatalities due to fires by federal states with and without compulsory smoke sensors in the period from 2002 to 2010"