BRK First Alert 9120BFF/ SMI100-AC Smoke Detector, Hardwired Alarm with Battery Backup, White, 1-Pack

I got this to replace a smoke detector, which was acting up and this worked perfect. The price was great. Installation was easy. Connected simply. Works great. Matches the one I was replacing. Piece of cake! Noise/alarm is loud. Peace of mind is back. Pleased w this replacement.

Exact one that I was replacing. Simply plug and play. Worked perfectly.

The BRK First Alert is the parent company of First Alert making this alarm just as good as the more expensive First Alert smoke alarms. They're easy to install, they can be wired in series so if one goes off they all go off or independently. I purchased 3 of them and I'm quite satisfied with them.

Work well

This product is very easy to work with.

great replacement for older BRK units. You just unclip the hot wire, remove the old holding plate, replace with new mounting plate, clip in new unit. No wiring, maybe 1-2 minutes to replace. comes with 9 volt installed. If you have a BRK now, get this. my old unit was 2003 and the hot wire clips matched.

Doing what it is supposed to do. My 30 year old ones (4) died at the same time. Wasn't sure I would be able to find the right fit. Yes to Amazon and quick delivery.

I needed to replace a First Alert model 9120B: it started to chirp because the battery was low. When I removed it from the ceiling I saw that it was over ten years old. I read that smoke detectors should be replaced at that age. I wanted an identical replacement so it would fit on the same mounting bracket in my ceiling and use the same power connector that's connected to AC power in the ceiling. I saw this model, 9120BFF, and the photos on the Amazon page show the unit labelled 9120B despite the "FF" at the end of the model number in the product description. I wasn't sure if it was the same, so I tried searching for model 9120BFF, but all I found was the same page on Amazon. But I ordered it anyway, and it is indeed the First Alert model 9120B. It is an exact replacement and works great. It fits on the same mounting bracket and uses the same power connector that my old smoke detector used. It comes with a new mounting bracket and power connector, which I don't need. And it comes with a new 9V battery: there's a plastic tab covering the battery terminals so no power is drawn until you pull the tab out of the unit when you install it. So why is this called model 9120BFF instead of 9120B? I think it's the packaging: see the picture attached. It comes in a plain corrugated box, which I assume is how they sell it to contractors. It's not in consumer packaging with a glossy cover like you'd find in a retail hardware store. But it's the same product: the label on the unit says Model 9120B, and it comes with instructions for that model. There's one other clue that it is sold to contractors: it includes a plastic dust cover that looks like a miniature shower cap. The dust cover is to be used during construction to keep dust out of the unit; you remove it when construction is finished. (It could be that the dust cover is also in the consumer version; I'm just guessing here.) Anyway, I'm happy with the purchase: it didn't require any ceiling work to replace my old smoke detector, which was my goal.

We bought this to replace our expired smoke detector. It was easy to install and it fit the base that was already mounted on our ceiling. This avoided removing a base and damaging paint, just to install a new base.

Works good so far :)

Rapport qualité / prix

These were easy to install, given that my First Alert smoke detectors had given it up after only one year of use. These were installed to replace the two that died, and they were throw aways ( which I really disliked). These ones have a drawer for a backup battery which is the way to go. Hopefully they perform well. So far so good. But the proof is in the performance

Great value easy setup