smoke and fire detector
356293
Easy to install.  Great safety addition to my home . . . I can sleep better knowing the First Alert is guarding over me.
4514424
Replacing my existing hard-wired expired smoke detectors with these was very straightforward. Once I got the first one installed the rest only took 10 minutes or so to do with an assistant. Programming which room they were in is pretty easy to do.

The only problem I ran into was that I didn't follow the configuration instructions carefully enough and I turned on the circuit breaker for the smokies before removing the battery pull tab on the units (or was it the other way around?). When the power turned on they all started to go into first-time configuration mode at once. I couldn't figure out how to get them to go into configuration mode again since they exit the config mode after a minute or two. Turning the breaker on and off didn't do anything. I believe I had to fully pull out the batteries (not just slide the drawer out, fully take the batteries out) to get it to go into config mode again.

Now that they are all installed, programmed, and tested I feel very confident that these will be effective in alerting us.
3436817
Easy install. Great nightlight feature but most important is that this detector sense hot fires and smoldering fires. Most other brands only detect one or the other. It's a life and death difference.
3269477
I use this to connect my home alarm system to the smokes. This allows the alarm to turn on lights when there is a fire and remotely alert. The only thing I wish it did differently is to distinguish between smoke and CO alarms. It alerts on both and you can't tell which one it is.
1506250
I'm not sure about this. I bought it to pair with my First Alert smoke/CO detectors, and I bought a smoke bridge, too. The hub could only "find" the smoke bridge if I plugged it in right next to it, but the smoke bridge said to put it near a smoke detector. I also thought I read that I would get a text if my alarms went off, but as it turns out, it's an email, which really doesn't help. I can't check my email all day but I would hear if a text came in.
1244827
I wanted to get some smoke detectors that would allow us to get notifications on our phone if they ever went off, and these will do just that without a monthly cost! These may be on the expensive side when it comes to smoke detectors, but when we are not at home it gives us some piece of mind knowing that the house and our two dogs are okay.

We also have a few Nest cameras that we are able to use to check on the house in case there is an alert on a smoke detector, but that has never happened when we've been away from the house. We have had them go off when we've been at home with some cooking mishaps that caused excessive amounts of smoke, thereby triggering the smoke alarms. The nice thing is that you can easily silence the smoke detector by pushing the button on the detector itself, or you can silence it on your phone.

It will also show you camera footage if you have any of the Nest cameras assigned to the same room as the smoke detector that is going off, which is a nice touch.
999306
Great smoke detector.  Love that I can remotely monitor Via nest app.  I can see last test, that "all is ok" at home and also cool that it shows (with the wired version) when the power goes out.  I think its a little pricy at $99 but its a very well-made product and also useful with Nest thermostat.
1502602
Anyone who has ever had a smoke detector near the kitchen knows about false alarms when something spills in the oven or on the stovetop. This solves that problem and wires into the other smoke detectors in my house. I'm really surprised that these heat detectors aren't available at Home Depot or other big box stores.
810073
I bought this unit to replace a prior model that was no longer available.  It's installed in tandem with other smoke alarms as was its predecessor.  It's less than a year old.

Since new, every few random months the unit chirps a random number of times at a random hour of the day - sadly, all but once at dark o'clock, waking up our little tykes. I've replaced backup batteries that test like new on my voltmeter, with new ones that also test positive, to no avail. None of the other units in tandem exhibit a problem.  All units, including this one, work as designed when running periodic tests.  The unit is neither dirty nor dusty.  And I know it works in smokey conditions as my wife occasionally proves by talking on the phone and cooking at the same time.

It's just the kind of thing that makes you want to do something dumb like disable it.
493052
I have purchased this as a replacement for one which was the same model but was defective.  I hope I don't have the same problem.  I am not in good health and when the smoke alarm goes off, I cannot go through the house and attic to confirm that it is in error.  I don't like having to have the FD out to check.
577439
My old smoke alarm was connected to the power. Easy install with this one, flipped off breaker, installed this one and brought it on the wifi and power. Now when im at work or gone I know if there is a fire in my house. We have cats and they are pretty important!
4234859
I liked the idea of a smoke detector that
1. also detects carbon monoxide
2. That has a pre-alarm alert that gently lets you know that you know that something is getting to alarm levels (like when something is left too long on the stove), so that you don't find yourself running around with screaming alarms as your first clue
3. a smoke alarm that will tell you which one is going off (which room to investigate)
4.  that can be controlled with a smart phone
5.  that doesn't ugly up a beautiful room.
I liked all those things and figured that, if it actually does some of that well, it would be a vast improvement of what we've had.
It does.
Not only that, it has a motion-detecting subtle nightlight!!!  and that cat doesn't activate it.  Just people!
Yay!  So much more civilized!
Oh... and set up was a breeeeze!
Get this thing!
3363122
Purchased Condo and all original smoke detectors were missing.  Purchased First Alert 9120BCP 6 pack and the install was pretty simple.  Removed existing base plates and original connectors but not difficult at all to install either one.  After that snapped new alarms on and tested and they worked great.
4869535
Amazing product that takes smoke alarms to the next level. Easy to install and operate. Although a bit on the pricey side it quickly is justified once you realize the amount of features that are included in the product.
4946358
There are well priced combination CO2 and smoke detectors.  They are battery operated.
4499814
Had one of my detectors go out, it was Firex.  Had to change the adaptors, but that was easy to do and it is working flawlessly in the overall system.
719204
The only comment I can make at this point is that installation was ridiculously easy with a time requirement of about 1/2 hour for eight smoke detectors and two CO detectors.  It couldn't have been easier.  The only reason for four stars versus five stars is that the true value won't be determined until the alarms trigger.  Hopefully, the only alert I ever get is when I periodically test the system.