Price: $79.99 - $51.12
(as of Dec 13, 2024 16:45:10 UTC - Details)

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.
First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency
Through early warning interconnect, when one alarm sounds, all compatible alarms will soun
Battery backup provides continuous protection during power outages
Alarm indicator visually identifies the unit that initiated the alarm
Quick Connect Plug included allows for easy installation with no need to rewire
Reviewer: musicman
Rating: 5.0 out of 5 stars
Title: Exact Replacement as Expected
Review: Great price and prompt delivery. If these are for replacements and your smoke detectors are old you may need to replace the bezel and the AC pigtail which are included. I replaced mine 10 years ago and that was necessary. This time these replacements fit perfectly. I still replaced the bezel because they had slightly ‘yellowed’ and it is very easy to do, just two screws. The pigtails did not need to be replaced.I recommend replacing the installed batteries which are not even alkaline. I replaced them with Amazon Basics 9V lithium batteries which should last ten years, the life of the detectors. FYI, I got 5yrs using alkaline cells but the extra cost of lithium cells will keep me off the ladder for the life of the detectors.

Reviewer: Ron
Rating: 5.0 out of 5 stars
Title: Easy To Install
Review: Easy to install and works great.

Reviewer: John Franklin
Rating: 5.0 out of 5 stars
Title: Excellent Replacement Smoke Detectors but no Co2 on this model
Review: Most people moving into a new home, don’t realize that whether it is a new construction or not, the installed smoke detectors have a limited effective lifespan…at the end of which they start chirping and you go nuts trying to figure out why and when you can’t you just unplug them completely and remove the batteries so you can go back to sleep…and then a couple days later you feel guilty that your family has no working smoke detectors…because when 1 goes bad, within days they all go bad. But you probably already know that, or else you most likely wouldn’t be reading this review. They are as easy to install as the old ones were to remove. Good luck. And remember to use a step stool or ladder so you don’t break your neck trying to use a chair or stacked furniture to reach it

Reviewer: Mindy Jordan
Rating: 5.0 out of 5 stars
Title: Easy OEM replacement for 20 year old house
Review: These were substantially cheaper to buy online and in a six pack then you could ever buy them at Home Depot or Lowe’s. Product worked exactly as expected. Would recommend 10 out of 10.

Reviewer: Grammy2012
Rating: 4.0 out of 5 stars
Title: Good price.
Review: 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.

Reviewer: James Ettwein
Rating: 5.0 out of 5 stars
Title: Nice upgrade and replacement for some aging detectors.
Review: I bought 5 of these to replace some very old smoke detectors. (useful life is 10 years). These were easy to install, but we needed adapters for some of the ones being replaced. I made a phone call to First Alert, and they are sending them right out. No charge. Good customer service.

Reviewer: A. Robinson
Rating: 5.0 out of 5 stars
Title: Easy Installation
Review: I had to replace 4 smoke detectors in my mom’s home after the fire department came and checked the alarms. These were cheaper than the same brand sold in Home Depot and Lowe’s. It was very easy to install since I used the wires already installed previously. Time will tell how well they work. So far, I’m satisfied with this purchase.

Reviewer: Hoagie
Rating: 5.0 out of 5 stars
Title: Easily installed smoke detectors
Review: Installed easily and instructions are great on how it works and operates, also they came with 9. Volt batteries!