Ten years of protection with no 3 a.m. low-battery chirps for your guests or your neighbors.

Most codes require one in every bedroom, outside each sleeping area and on every floor. Check your local rules.
No. The battery is sealed for the 10-year life of the alarm, then you replace the whole unit.
Airbnb asks hosts to confirm smoke and carbon monoxide alarms, and guests see that safety info on your listing.
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