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Price: $129.99 - $108.99
(as of Feb 02, 2026 03:22:33 UTC – Details)
B0DS2VG4P1, The fire safety you trust is now connected and compatible. Add smart fire safety alerts to your home with the First Alert SC5 Hardwire Smart Smoke and Carbon Monoxide (CO) Alarm. This 2-in-1 device elevates your home’s fire and CO safety whether home or away.
Compatible with Google’s Nest Protect Alarm
Sends alerts to your phone if smoke and CO are detected through the First Alert app
Interconnect so when one alarm sounds, all compatible alarms in the home sound
Battery backup provides continuous protection during power outages
Voice alerts with Heads-Up warning tells you the type and…, 4.5,
Reviewer: CF
Rating: 1.0 out of 5 stars
Title: Cheap looking, false alarms, nowhere close to Nest quality
Review: What a sad, embarrassing replacement of Nest!Looks nothing like the Nest detectors, ridiculous false alarms, central button doesn’t work, battery door doesn’t close and jiggles, connection dropped two times before finally it got through, then it stopped again, the sound is pathetic, looks cheap and very much like older detectors from the 90s.You have to download their app, open an account via email, get through ridiculous requirements of address, names, surprised they didn’t ask for your bank account, finally what supposed to be a simple, intuitive replacement of Nest, you end up with a new app, a new account with this company, and a link to Google home ( which you have to download and set up, you cannot add this to Nest app, where you have all the other products)Google destroyed probably the best safe protect products on the market, and came out with a bunch of pathetic expensive cameras that miss most of the important recordings, and the only offer for replacement of the amazing Nest detectors are these trash first alert ones, which are expensive because Nest owners have no other options. Shame on you, Google, not only you took over and ruined a company that put quality and smart devices out there, you charge a lot for miserable products and you do not stand up for what you put out there, low quality, ridiculous prices and horrible customer service.Whoever owned Nest should get back together, go to the drawing board and come back with new Nest products that were an image of excellence and quality.
Reviewer: Alan
Rating: 5.0 out of 5 stars
Title: First alert hardwired SC5 wifi and 6 hardwired non wifi smoke detector set
Review: Set up a single SC5 with compatible non wifi hard wired smoke detectors and also bought the quick connect adapters. Install was a breeze, and if you read the instructions BEFORE you jump in the app and set up were quick and easy.If this system produces frequent false alarms, I’ll be sure to update this review, but so far I’m very pleased, and hope I never need to use them in a real emergency.
Reviewer: Karen L Pierangeli
Rating: 4.0 out of 5 stars
Title: Really missing the path/night light in the Nest model
Review: I had to replace 3 Nest Protect Smoke/Carbon Monoxide detectors since they were 10 years old. First Alert is now the replaacement model. They integrated well with the other Nest detectors I have. The units are not the same quality of materials but are ok. The one feature missing is the motion-activated path/night light that was in the Nest detectors. Not sure why they choses not to include it but for me it’s a big miss.
Reviewer: Sam Beckett
Rating: 1.0 out of 5 stars
Title: Frustrating Downgrade from Nest Protect – Why Did Google Make This Worse?
Review: Let me start by saying, I was a huge fan of my old Nest Protect smoke and CO alarm. It served me loyally for a decade, always reliable and almost a little too smart for its own good. When it finally nudged me to upgrade, I figured this new First Alert SC5 “Smart Smoke & Carbon Monoxide Alarm”—especially since it’s pitched as compatible—would keep that peace of mind going. But wow, was I wrong on that.The first thing I noticed is the style: side-by-side, this new First Alert device just looks plain clunky next to the smooth, modern Nest Protect that’s been a familiar face in my home. In the attached photo, you can see what I mean—the new alarm is bulkier, with a glowing blue ring that honestly feels more sci-fi than homey. Setting it up threw me for a loop, too. It was far less intuitive, didn’t pair as easily, and generally left me wishing I had my old friend back. I had to read the instructions twice, and for someone who usually breezes through tech installs, that’s saying something!But here’s the kicker—this alarm costs way more, but seems to do a whole lot less. All the features I loved (smooth app integration, ease of testing, helpful heads-up notifications) feel stripped down or just awkward to use here. You’d think for the price, it’d offer an upgrade, but honestly, calling it a “sidegrade” would be generous. Even the “precision detection technology” is marketed as an improvement, yet I can’t say it feels any better than my Nest ever did. I half-expected it to start making me coffee in the morning for this price.My advice? Don’t buy into the hype just because Google nudges you with compatibility talk. If you’re in the market, a $30 plain old detector probably does the same job (minus the pretty lights) without any of this frustration. Google used to say “don’t be evil,” but pushing people towards a more expensive, less functional product has me wondering if they remember their own slogan.
Reviewer: Stephen L.
Rating: 5.0 out of 5 stars
Title: They replace the Nest But they’re missing a nightlight
Review: I bought these as my existing Nests were 10 years old and the app told me they needed to be replaced. I guess Nest no longer makes smokes. These were designed to pretty much plug in direct to the nest wiring harness. The Nest I had were hardwired in with a battery backup. That part of it work fine although these aren’t as nice as the Nest The Nest had a Nightlight embedded in them which was very helpful. But overall they’re fine. Nothing wrong with using these to replace what you’ve got. I’d buy them again. BTW Smoke detectors don’t last forever. I’m in the real estate business. I go into a lot of houses where the smoke detectors look 20 years old. They should be replaced every 5-7 years. Get on it people p51
Reviewer: Johanna D.
Rating: 3.0 out of 5 stars
Title: OK replacement for Nest Protect
Review: My primary reason for choosing this was the ability to reuse the existing hanging mechanism from the Nest protects that just expired. I also wanted battery powered. This was super easy to setup and install. I just wish it had the glowing white light that the nest protect had when the light went off it or sensed someone walking into the room. If it had this it would be the perfect replacement for the nest protect.Update – one of the two that we purchased is giving false alarms. The first time was due to a steaming shower so OK I’ll start closing the bathroom door even though I don’t really want to; the 2nd time was cause I blew out a candle; I dismissed that one (and still OK, that was my bad); it went off again about 30 min later, no reason; maybe it was the AWS outage from yesterday? But then last night, it went off out of nowhere. It’s currently off the wall with no batteries in it. It’s unfortunate cause I really wanted to use the existing Nest mounting. I would say in 10 yrs I didn’t ever have a false alarm from the Nest Protect.
Reviewer: michael hird
Rating: 1.0 out of 5 stars
Title:
Review: DO NOT BUY- A DANGER TO LIFEWrong voltage DOES NOT WORK IN UK.NEITHER DOES APP.COMPARED TO MY NEST WHICH I HAD FOR 10 yrs— absolute trash, inferior in every way.I feel I’ve been mugged by Amazon after spending over £ 200Nearly electrocuted myself setting up resulting in one short circuiting on meWHY IS THIS SOLD IN UK ??????Complaint is going in nowPLEASE DO NOT BUYHad to give one star as would not allow me to give zero,
Reviewer: Grumpy
Rating: 1.0 out of 5 stars
Title:
Review: Don’t buy this item if you are in the UK. It operates on 110V and is therefore not compatible. The description doesn’t tell you this and it’s incredibly hard to find in the specifications. You only learn by hard experience.Why they would allow purchase and shipping to the UK is beyond me.Also the app for the UK doesn’t support these devices, so if you’re thinking of getting the battery version, you’ll have to work around that.
Reviewer: Eliz K.
Rating: 1.0 out of 5 stars
Title:
Review: Unfortunately does not work in the UK. I don’t know why Amazon is selling it here.
Reviewer: Andy Maddison
Rating: 1.0 out of 5 stars
Title:
Review: This is a 120 volt unit sold to UK. Incompatible with 220 volt UK power network.
, Tools & Home Improvement > Safety & Security > Fire Safety > Smoke Detectors & Fire Alarms, #Alert #SC5 #Hardwire #Smart #Smoke #Carbon #Monoxide #Alarm #SMCO600NVAC #1Pa..,
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