What does it mean when my kidde smoke alarm is flashing a red light every 15 seconds with no noise? - Quora
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Combination Smoke and Carbon Monoxide Alarm Detector,Dual Sensor Smoke Alarm and Carbon Monoxide Detector and Replaceable Battery Smoke and CO Alarm with Digital Display for Your Home, Garage, Office : Amazon.co.uk: DIY
![Is that a hidden camera in my hotel room's smoke detector? from this little hole there is a red light flashing every ~5 seconds : r/hiddencameras Is that a hidden camera in my hotel room's smoke detector? from this little hole there is a red light flashing every ~5 seconds : r/hiddencameras](https://i.redd.it/dmpjvd3nzska1.jpg)