First Alert Battery Smoke Alarm | SMI100

This smoke alarm was quick and easy to install, and it provides exactly what I was looking for-reliable protection and peace of mind. The instructions were clear, and it was up and running in just a few minutes. The alarm has a clean, low-profile design that blends in nicely with the ceiling. I also like that it's battery operated, so it continues working even if the power goes out. The test button is easy to access, and the alarm is loud enough to be heard throughout the house, which is exactly what you want in an emergency. If you're replacing an old smoke detector or adding extra protection to your home, this is a dependable, easy-to-install option from a trusted brand. Highly recommend!

I purchased this smoke alarm to replace one that was very old and needed to go! This one was affordable it arrived quickly and was simple to remove the plastic barrier so the battery would work and then even easier to install on the wall and now I have peace of mind that if something crazy happens at my house this smoke alarm will alert me. I highly recommend this product.

Easy to install. Just what I needed

Very pleased with this purchase. Packaging was great. Bought this as used and they were in original condition. Batteries were new so nothing had been used or previously installed. I had purchased a First Alert before for my camper from Camping World. It came with a Duracell battery. These did not. I opted for a yeary battery change vs. the 10 year internal battery. I had the 10 year (not First Alert), and they only lasted 4-5 years.

Easy to install and I love that it takes AA batteries. I will say it’s a bit too sensitive. Too much steam from the hair dryer will set it off. But, better safe than sorry, I guess.

so easy to put up, love that they work on a regular battery not hard to find at any local store, work well, spouses cooking sets it off quite readily, which is a good comfort to know how well they work.

A quick install. I was prepared to drill a new hole or two, but I found two from previous installations that lined up perfectly. The design of the frame that holds the working part allows for quite a few options for hole spacing. If you are replacing an old one in the same location, you may also find you don't need to get out a 3/16" drill bit. It will fit as is. Battery is supplied. I have spares. I tested it with matches. Works perfectly. An additional plus is that it is Made In Mexico, which I consider a plus, because I don't want China getting any more of my business than I have to give them. As you can see, what I got does not look like the image of what I ordered. Same model number however.

I've been using this brand for decades and I'm glad they took things to a little higher level for the most basic even though it costs a little more . For some reason the ones I have that were the old basic unit would last about 3 years then start beeping like the battery was dead even with a new battery , thus needed to be replaced . This unit is easier to blow off the sensor and hopefully that'll help it last longer . Nothing more annoying than that irregularly timed beep at oh dark thirty and not knowing which one it is because of the irregularity of when it beeps . I have a smoke detector in every bedroom, laundry , kitchen, den and hallways for a total of 8 in the home. Not knowing which one needs attention sucks . This one did need for me to change the frame it fits in but the screws stayed in the same spots so it was super quick to change out .