How Does Your Smoke Detector Work?

Connecting Low-Voltage Smoke Detectors

Smoke detectors and alarms, Part 2

How Optical Smoke Alarms Work - Safelincs

How Do Smoke Detectors Work? - Spy Alarms

Wirelessly interconnect your smoke alarms so they communicate with each other, 120VAC hardwired wireless interconnect smoke alarm with battery backup.

First Alert Wireless Interconnect Hardwired Smoke Alarm - SA521CN-3ST (1039830)

How Do Smoke Detectors Work?

Never change a smoke detector battery again (and still keep your family safe) : Atta Girl Says

How smoke detectors work - Explain that Stuff

4 Ways to Disable a Fire Alarm - wikiHow