Smoke Alarm, Battery-Operated Detector with Test & Silence Button, SMI100, 1-Pack

Works great and is easy to put on the wall.

I recently purchased the First Alert SMI100 smoke alarms and I’m really happy with them. Installation was incredibly easy since they are battery operated, so there was no wiring needed. I had both alarms mounted in just a few minutes. The design is simple and clean, and the front battery compartment makes it easy to change the battery without taking the whole unit down. I also like the test/silence button on the front because it makes testing the alarm quick and simple. The alarm itself is loud enough that you would definitely hear it throughout the house, which is exactly what you want for safety. The detectors use updated sensing technology designed to give early warning of fires while reducing nuisance alarms from things like cooking smoke.Overall, these smoke alarms give me peace of mind knowing my home has reliable protection. They were affordable, easy to install, and work exactly as expected. I would definitely recommend them to anyone looking for a simple and dependable smoke alarm.

These aren't interconnected, and are powered by battery only. But they do the job as described and are a lower cost option to replace the more costly interconnected "wired" models.

Good quality for the price and easy to install.

A great, cheap option for a smoke detector! Installed onto the wall super easy. One issue, is the battery compartment can catch when trying to install the battery, but a little pressure and it clicks into place (without breaking any plastic, thankfully).

If you are looking to replace an outdated or constantly chirping detector with a reliable, standalone safety device, the First Alert SMI100 Battery-Operated Smoke Alarm is an outstanding upgrade. The defining feature of this model is First Alert's Precision Detection advanced sensing technology, which is specifically engineered to meet strict modern UL 217 industry standards. This smart ionization framework is highly sophisticated—it can distinguish between real, high-velocity fire emergencies and common, non-threatening cooking smoke or shower steam. This means you can mount it near kitchens or hallways without dealing with annoying false alarms every time you sear a steak or open a hot oven. Maintenance on this unit is exceptionally user-friendly. It features a front-loading battery compartment, which means you can swap out the backup battery in seconds without having to twist the entire detector off its ceiling bracket. It includes a multi-purpose Test & Silence button that lets you check the electronic circuits with a single tap, or temporarily mute a nuisance alarm for up to 8 hours. When the unit finally approaches the end of its operational lifecycle, an automated end-of-life chirping warning lets you know exactly when it is time to swap out the physical detector, ensuring your living space stays continuously protected.

So far so good, what I love the most is that it doesn't have a constant green light on like the one I used to have. This one flash once every minute. I think that saves some energy usage and make the battery more long lasting. Easy to setup once you read the instructions at least 3-5 times lol, it took me like 10 mins to setup. The instructions were a bit confusing at first, the pictures weren't really explaining anything, you have to read the long-written instructions to be clear on the steps. I did not put in the plastic screws to secure the detector as instructed, I only drilled in the metal screws and it's sitting in the ceiling just fine.

So far so good, we've had these fire alarms for about a year now and the one near the kitchen we replaced the batteries about 6 months ago, and the other one we just did for the first time. The one near the kitchen has been triggered a few times due to various baking mishaps so that makes sense I guess, definitely loud enough to wake you if necessary. Its a bit of a pain to change the batteries but that's life. Seems to be reliable and that's all I really care about. Install was simple enough.