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neomatrixviper 19.9K Views
Jan 20, 2026 3:49 PM

Costco Members: 2-pk First Alert Z-Wave Battery Smoke & CO Alarm (Works w/ Ring)

$75

$100

25% off
+ Free Shippingat Costco Wholesale
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Deal Details
Costco Wholesale has for its Members: 2-Pack First Alert Z-Wave Battery Smoke & CO Alarm on sale for $74.99. Shipping is free.

Thanks to community member neomatrixviper for finding this deal.

Features:
  • This device is certified to work with Ring; Requires Ring Alarm Base Station to Work with Ring. Enjoy improved compatibility, easier setup and a seamless in-app experience
  • Temperature Range: 40°F (4°C) to 100°F (38°C). Humidity Range: 10% to 95% relative humidity (RH)
  • Receive real-time notifications in the Ring App when smoke or carbon monoxide is detected
  • Certified to work with smart home systems such as Ring Alarm Base Station, Samsung SmartThings, and Nexia Home Intelligence when connected to a Z-Wave Plus gateway hub (sold separately)
  • Help keep your family safe with this 10-year battery-powered smoke detector and carbon monoxide alarm
  • The Z-Wave Plus with Smart Start feature allows a faster and more intuitive connection of device to hub and on-boarding via QR code scan located on device
  • Photoelectric smoke sensor helps reduce false alarms caused by cooking or shower steam
  • Includes an 85-decibel horn, single test/silence button, side access to a tamper-resistant battery door, and pins that lock the alarm to the mounting bracket

Editor's Notes

Written by StrawMan86 | Staff
  • If you don't have a Costco Warehouse Membership, you can sign-up here
  • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.

Original Post

Written by neomatrixviper
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Costco Wholesale has for its Members: 2-Pack First Alert Z-Wave Battery Smoke & CO Alarm on sale for $74.99. Shipping is free.

Thanks to community member neomatrixviper for finding this deal.

Features:
  • This device is certified to work with Ring; Requires Ring Alarm Base Station to Work with Ring. Enjoy improved compatibility, easier setup and a seamless in-app experience
  • Temperature Range: 40°F (4°C) to 100°F (38°C). Humidity Range: 10% to 95% relative humidity (RH)
  • Receive real-time notifications in the Ring App when smoke or carbon monoxide is detected
  • Certified to work with smart home systems such as Ring Alarm Base Station, Samsung SmartThings, and Nexia Home Intelligence when connected to a Z-Wave Plus gateway hub (sold separately)
  • Help keep your family safe with this 10-year battery-powered smoke detector and carbon monoxide alarm
  • The Z-Wave Plus with Smart Start feature allows a faster and more intuitive connection of device to hub and on-boarding via QR code scan located on device
  • Photoelectric smoke sensor helps reduce false alarms caused by cooking or shower steam
  • Includes an 85-decibel horn, single test/silence button, side access to a tamper-resistant battery door, and pins that lock the alarm to the mounting bracket

Editor's Notes

Written by StrawMan86 | Staff
  • If you don't have a Costco Warehouse Membership, you can sign-up here
  • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.

Original Post

Written by neomatrixviper

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Top Comments

jmxi
282Comments
128Reputation
I have these and they work great with Home Assistant.
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kevinuo
321Comments
95Reputation
Not sure if they're related but.. I did a small fact check :

As a product manufactured in Mexico, the First Alert Z-Wave Battery Smoke and CO Alarm (including models ZCOMBO-G and SMCO410) typically qualifies for duty-free treatment under the United States-Mexico-Canada Agreement (USMCA).

Not that I like tariff, it's just not everything is tariff problem Smilie
Go to Comment
Rudedog7
629Comments
219Reputation
Don't want to poop poop on the deal, but you can make your current existing interconnected smoke detectors Z-wave smart. The Zooz Zen 55 can be wired into your existing interconnected smoke detectors and will send notifications for Smoke/Fire and CO. I used to have a different solution that used modules and open and closed switches, but switched to Zooz and it's been working great.
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66 Comments

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Jan 20, 2026 6:31 PM
2.7K Comments
Joined Aug 2004
cacadiabloJan 20, 2026 6:31 PM
2.7K Comments
Does this work with a Eufy hub?
Jan 20, 2026 6:34 PM
628 Comments
Joined Mar 2006
weirdlyJan 20, 2026 6:34 PM
628 Comments
I had the 1st generation of these. They worked great with Ring, except for the all-to-frequent false alarms. It seemed that as the batteries got low, false alarms became more frequent!

Hope they fixed this. Maybe the 10 year battery will. Can anyone confirm?
Jan 20, 2026 7:26 PM
321 Comments
Joined Nov 2011
kevinuoJan 20, 2026 7:26 PM
321 Comments

Our community has rated this post as helpful. If you agree, why not thank

Quote from techie333 View quoted comment :
Yeah 2023, not in these random tariffs every month times
Not sure if they're related but.. I did a small fact check :

As a product manufactured in Mexico, the First Alert Z-Wave Battery Smoke and CO Alarm (including models ZCOMBO-G and SMCO410) typically qualifies for duty-free treatment under the United States-Mexico-Canada Agreement (USMCA).

Not that I like tariff, it's just not everything is tariff problem Smilie
3
1
Jan 20, 2026 7:29 PM
321 Comments
Joined Nov 2011
kevinuoJan 20, 2026 7:29 PM
321 Comments
Quote from cacadiablo View quoted comment :
Does this work with a Eufy hub?
I don't think Eufy security hub is z-wave compatible so the answer is no.
Jan 20, 2026 7:40 PM
316 Comments
Joined Jul 2011
lenvalJan 20, 2026 7:40 PM
316 Comments
I use these for two residences with Ring plans but FYI they will not work with a Ring business plan unless you override it. Not worth it though, IMO...I tried (and it will work) but they are required to call the fire department, no confirmation call allowed with the smoke detector in business, but I can get confirmation calls with burglary alarm just fine. Odd.
Jan 20, 2026 8:54 PM
552 Comments
Joined Jan 2007
SpotmomJan 20, 2026 8:54 PM
552 Comments
I have these with the Ring system. The "older" ones that take batteries (less than 2 years ago) and those really ate batteries. They would look fine until a test or someone set them off cooking (has only happened once in all the years I used them) then the batteries would need replacing. Makes you not want to test them weekly/monthly as recommended with most detectors. They are a great idea though. Regular alarms, if you aren't home only make noise that likely no one will hear. These at least will alert you if something is going on. Wish they weren't so expensive. I do have 5 of them already. One is pretty close to the wood stove and never goes off so I have to wonder sometimes.
Jan 20, 2026 9:19 PM
45 Comments
Joined Nov 2017
piper28Jan 20, 2026 9:19 PM
45 Comments
Quote from Rudedog7 View quoted comment :
Don't want to poop poop on the deal, but you can make your current existing interconnected smoke detectors Z-wave smart. The Zooz Zen 55 can be wired into your existing interconnected smoke detectors and will send notifications for Smoke/Fire and CO. I used to have a different solution that used modules and open and closed switches, but switched to Zooz and it's been working great.
Ooh, now that looks tempting. Code here requires hardwired interconnected smoke detectors, you're not allowed to replace a hardwires one with a battery one (even the long life batteries apparently), so these zwave ones have always been kinda useless to me. That zooz device looks like it would be a piece of cake to install, especially since I used wago's to connect the wires last time I did the smoke detectors.

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Jan 20, 2026 9:23 PM
629 Comments
Joined Nov 2017
Rudedog7Jan 20, 2026 9:23 PM
629 Comments
Quote from piper28 View quoted comment :
Ooh, now that looks tempting. Code here requires hardwired interconnected smoke detectors, you're not allowed to replace a hardwires one with a battery one (even the long life batteries apparently), so these zwave ones have always been kinda useless to me. That zooz device looks like it would be a piece of cake to install, especially since I used wago's to connect the wires last time I did the smoke detectors.
Yes you got it. The 3 hole wagos would easily work. Three wires to connect. Black to black, white to white and red to red. You can add it to any of your junction boxes but they recommend it in the last due to more room. However, kind of hard to determine which one is the last without pulling all the detectors out. I did have to update the firmware on mine a while back. I am still running smartthings. I have like 8 hardwired smoke detectors I was able to add it to.
Jan 20, 2026 9:40 PM
445 Comments
Joined Oct 2009
MonkeyKing2018Jan 20, 2026 9:40 PM
445 Comments
Was going to bite but don't see a need for the z-wave feature. Just bought the non-Zwave from AMZ which were 2 for 30.
Jan 20, 2026 10:32 PM
321 Comments
Joined Sep 2011
lausaiJan 20, 2026 10:32 PM
321 Comments
Quote from MonkeyKing2018 View quoted comment :
Was going to bite but don't see a need for the z-wave feature. Just bought the non-Zwave from AMZ which were 2 for 30.
can you share the link for that?

i was going to get and forgo the zwave or get the non-zwave but they're still 2 for 75
Jan 20, 2026 10:49 PM
2.8K Comments
Joined Nov 2011
TaintJan 20, 2026 10:49 PM
2.8K Comments
Do these still have the issue where they give the low battery alert at ~78% battery?
Jan 20, 2026 11:05 PM
37 Comments
Joined May 2010
krushibabuJan 20, 2026 11:05 PM
37 Comments
Quote from drawz View quoted comment :
Can these be silenced from your phone? Do they communicate with each other? One of these days I'll have to replace my now discontinued Nest smoke/CO detectors.
I am also in the same situation. My Nest on expired and need to replace. Wanted to buy something which I can silence using my phone. If it is not feasible with these, what the other options are available for silencing using a phone?
Jan 20, 2026 11:43 PM
577 Comments
Joined Dec 2016
fvp1992Jan 20, 2026 11:43 PM
577 Comments
Quote from MonkeyKing2018 View quoted comment :
Was going to bite but don't see a need for the z-wave feature. Just bought the non-Zwave from AMZ which were 2 for 30.
To set up alerts if you're not home
Jan 21, 2026 12:25 AM
2.7K Comments
Joined Aug 2004
cacadiabloJan 21, 2026 12:25 AM
2.7K Comments
Quote from kevinuo View quoted comment :
I don't think Eufy security hub is z-wave compatible so the answer is no.
Ok, thanks. Are there any out there that are?

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Jan 21, 2026 12:57 AM
17.8K Comments
Joined Nov 2003
deshwasiJan 21, 2026 12:57 AM
17.8K Comments
Quote from Rudedog7 View quoted comment :
Don't want to poop poop on the deal, but you can make your current existing interconnected smoke detectors Z-wave smart. The Zooz Zen 55 can be wired into your existing interconnected smoke detectors and will send notifications for Smoke/Fire and CO. I used to have a different solution that used modules and open and closed switches, but switched to Zooz and it's been working great.
thanks a lot. bookmarked it for future. i do have a prev model battery ZCOMBO that is working fine with smartthings but will do the zooz install so all floors are covered for a situation when no one is home.

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