Flawless function 6

In our house 15 of these smoke detectors have been installed by the landlord. These smoke detectors have triggered a single false alarm in recent years. The smoke detectors are checked annually by an electrical company and in these tests the detectors have so far always works properly (ie not only to press the button, which can indeed any, but a real test). Since it is not required to equip homes with smoke alarms, we have privately purchased for both our living spaces to ensure the safety to increase these smoke detectors us something. So I can only recommend this smoke detector. You see the way of even good.