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Your cart is empty.The First Alert SMI100-AC Hardwire Interconnect Smoke Alarm with Battery Backup meets new industry standards utilizing First Alert's Precision Detection advance sensing technology. This hardwire smoke alarm is easy to install and replace existing alarms with no need to rewire. Plus interconnect compatible alarms to create a whole home alarm system to help provide an early warning.
Roy
2025-08-03 17:14:29
Excellent replacement for original smoke detectors. Easy to install with clear instructions. Great price and LED indicators are a plus to see that units are working. A definite recommend
Robert A. Finkle
2025-06-16 18:28:46
Easy to install. Batteries are not as easy to change due to door lock system but since its is one time a year it is not an issue.
Customer
2025-06-03 10:05:43
Easy to replace, and came as described.
Grammy2012
2025-02-15 14:36:21
The installation of these smoke detectors was straight forward. Each one worked just fine. I would buy them again. My tiny problem was they didn’t come with screws. It’s a new build so no existing mounts. Wish I would have known to save a trip to a store when we live 30 miles from a store out in the country. But all in all a good product at a good price.
Carmen Seal
2025-02-09 13:36:58
This was exactly the same as the old ones I replaced which I had for 17 years. Plugged right in.
Kyle K.
2025-01-28 13:13:21
We had a bunch of old, expired hard-wired smoke detectors in our house. These were perfect replacements for them, and they all worked well together. I didn't have any issues with them communicating with the others whenever you tested them. No complaints and they test out as expected.
Kharmangia
2025-01-13 13:26:28
Arrived in great shape, early and they were easy to install.
Cee Dee
2024-11-20 13:28:59
Easy installation-- work reliably. Nice to have these updated smoke alarms in the entire house.
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