
Be alerted to fire in its very earliest stages with this First Alert photoelectric smoke alarm. The optimized sensor detects smoldering fires while distinguishing between real and false threats, reducing nuisance alarms. The 10-year built-in battery ensures continuous power to this First Alert photoelectric smoke alarm, even during power outages.
Q: What is the diameter of the detector
A: It is 5.13 inches in diameter.
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A: Yes. There's a possibility that the battery could runs off.
Q: Do you have hard Wired Smoke detectors?
A: Yes, the battery detectors should be in the bedroom and the hard wired at stair levels.