I bought these smoke detectors, as this has no LED, which flashes at intervals. Because as a smoke detector has found its place in the bedroom was my very important because I can not use there rumgeblinke. Included with the smoke detectors were two screws and dowels. So it was because of the part to Schauben everything at the ceiling. To check the function of the smoke detector is pressed eg with a broomstick for a few seconds the big button in the middle. The smoke detector beeps then three times and then you know he is ready.
Conclusion: The smoke does the job, and does not interfere with Geblinke. The functional test is very simple, since the button is very large. Whether the Racuhmelder ultimately served its purpose I would actually then finally not test, hoping it will just be careful and never report alarm.
