First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 3-Pack

The product was really easy to install given that the existing connections were exactly the same. The only thing is disliked was that it didn't include screws for mounting the base to ceiling. Alert sound is good. Standard four beep and has a nice green light indicator.

Nothing to dislike. My old were installed in 2017, all 5 started a chirp sound. I had just changed all batteries 2 months prior, now thinking what is going on. In checking further lifespan is 10 years. Well these are less then 10 years but replaced all 5. I made sure to purchase the correct updated version. Yes I did and easy to install.

Great replacement product and worked with my existing smoke detectors (hard wired throughout the house)..

These wired home smoke alarms are great. We bought our first ones 17 years ago. They are targeted to last 10 years. So having an extra 7 years of use was a plus so we installed these in our home again this year.

Being able to change the battery when it is drained is a plus. I've had too many instances when those 10 year lithium models go off in the middle of the night and cant turn off the alarm.

I had this brand before and was replacing after 10 years. I was able to install myself without an electrician. After turning off breaker, unplug old and plug in new.

Quick delivery, easy hookup, twist and snap into place.

my fault, thought I ordered battery powered, but they are wired.

i ordered a pack of 3 smoke detectors. Installation was a breeze. everything went fine until a month and a half later that one of 3 started blinking red. I contacted the seller and was told to contact manufacturer for warranty claim. I ended up sending them back

It appears the product ordered... we ordered several... are fortunately in working order, despite the horrible shipping containers. The first set arrived safely in a shipping box. But the remaining were instead stuffed in a thin envelope and the thin product boxes were all bent and damaged. One opened with product falling out. Fortunately they still appear to be working, but whomever chose to ship them in a thin envelope vs a shipping box surely didn't care what condition we'd receive them in. We're lucky they are usable.