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  • The text on the image reads: "ALARM TEST TO PUSH SMOKE & ALARM AIR FRESH TO MOVE PUSH TO ALARM SILENCE POWER." This text is grouped and corrected as follows: "ALARM TEST TO PUSH SMOKE & ALARM AIR FRESH TO MOVE PUSH TO ALARM SILENCE POWER."
  • Alert First Alarm Test to Push Air Fresh to Move Smoke & Alarm Push to Alarm Silence Power.
  • TASJA FIRST
  • The text on the image is grouped and corrected as follows: WARNING! WARNING: BATTERIES SPECIFIED OTHER BATTERIES CANNOT SMELLED HAVE DETRIMENTAL EFFECT ON PRODUCT OPERATION CONSTANT HIGH TEMPERATE HIGH HUMIDITY REDUCE BATTERY ALARM SIGNAL SOUNDS: OPERATE SILENCE BUTTON BATTERIES: FIRST ALERT FA321 YOUR EMERGENCY SERVICES FIRE DEPARTMENT 911 IMMEDIATELY MOVE FRESH OUTDOORS DOOR WINDOW Manufacture Date 2024 DEC MAINTENANCE: Gently vacuum compressed remove accumulated dust Installation Date weekly cleaning check msis functions. REPLACE ALARM YEARS AFTER INSTALLATION BLACK LINE ORANGE INTERCONNECT WHITE NEUTRAL VAC-60Hz 0.07A Replace Date N04-7065-000 ALARM GUIDE: Beeps Flashing Smoke Alarm Beeps Flashing Alarm "Chirps every Minute Flashing Green Replace Alarm "
  • The text on the image reads: "ALARM TEST TO PUSH AIR FRESH TO MOVE SMOKE & ALARM PUSH TO ALARM SILENCE FIRST ALERT POWER."
  • FIRST ALERT SC5 MODEL: SMCO600NV-AC Single and/or Multiple Station Smoke Alarm & Carbon Monoxide Alarm Smoke Sensitivity: 2.4% obs 25% MAC ID: XXXxxXxxxxxxxx WARNING! WARNING: USE ONLY BATTERIES SPECIFIED. USE OF OTHER BATTERIES CAN CAUSE CARBON MONOXIDE POISONING. CARBON MONOXIDE CANNOT BE SEEN OR SMELLED BUT CAN KILL YOU. MAY HAVE DETRIMENTAL EFFECT ON THE PRODUCT OPERATION. CONSTANT USE AT HIGH OR LOW TEMPERATURE OR HIGH HUMIDITY MAY REDUCE BATTERY LIFE. 1 ALARM SIGNAL SOUNDS: OPERATE TEST SLENCE BUTTON BATTERIES: FIRST ALERT FA321 CALL YOUR EMERGENCY SERVICES, FIRE DEPARTMENT OR 911 IMMEDIATELY. MOVE 10 FRESH AIR OUTDOORS OR BY AN OPEN DOOR/WINDOW. Manufacture Date: 2024 DEC 08 Maintenance: Gently vacuum or clean compressed air to remove accumulated dust monthly. Never use matter cleaners or solvents, since they may damage the nit. Press the test button after installation, location and after cleaning to check all functions. Replace alarm 10 years after installation.
  • The image shows a collection of electronic components and wires, including a white box, a speaker, a power supply, and a yellow battery. The components are arranged in a way that suggests they are part of an alarm system or a home security system. The text on the image reads "This ThissHdeAWAY aidla AWAY Iram wall I coiling ALARM EST e BOKE - S ALARM We RESH iB SAOY PUBY TO PRT ZONEYS POWER." This text might be related to the alarm system or the components' functions.
  • The text on the image reads: "1 ALARM TEST TO PUSH AIR FRESH TO MOVE SMOKE & CO ALARM PUSH TO ALARM SILENCE 1 SERVICES ALER works with Nest Protect G POWER."
  • The text on the image is not coherent enough to group and correct. It seems to be a random combination of letters and words without any clear meaning or context.
  • Alt View 6. First Alert - Smoke and Carbon Monoxide Detector Hardwired - White.

First Alert - Smoke and Carbon Monoxide Detector Hardwired - White

Model:
FSMCO600NVACCL1
SKU:
6633005
Highly rated by customers for:
$129.99

Customer reviews

Rating 4.3 out of 5 stars with 152 reviews

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Rating by feature

  • Value

    Rating 4.0 out of 5 stars

  • Quality

    Rating 4.3 out of 5 stars

  • Ease of Use

    Rating 4.5 out of 5 stars

Pros mentioned filter

Cons mentioned filter

88%would recommend to a friend

Customers are saying

Customers highly value the straightforward installation process and the reliable overall performance of this product. While users appreciate the modern connectivity options and user-friendly app, some feel the device is expensive given the absence of certain features like a night light or motion sensor. Additionally, a few customers noted concerns regarding alarm sensitivity and accuracy in specific environments.

This summary was generated by AI based on customer reviews.

The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
Page 5 Showing 81-100 of 152 reviews
  • Pros mentioned:
    Installation ease

    Not the same, but is just fine!

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Yes it's not nest, and yes it doesn't have a night light. That being said, easy set up. Aside from having to download the First App, it was the exact steps as having to install a new smoke detector. And less work than replacing with a different model.

    I would recommend this to a friend
  • Pros mentioned:
    Overall performance

    First Alert SC5

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    Posted . Owned for 7 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Excellent product. Really good product. A top pick.

    I would recommend this to a friend
  • Pros mentioned:
    Installation ease

    Easy to install & the app seems fine..... BUT

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Easy to install & the app seems fine. But I'm pretty salty about this being the official replacement for the Nest smoke / CO2 alarm, yet the motion activated pathway light function has been taken away. Because of this, I'm not sure I will use this for all 7 of my alarms.. But I 100% would have if it had the same light function as the Nest.

    I would recommend this to a friend
    • Brand response from FirstAlertProductExpert
      Posted .

      Hi DominickF, thank you for your feedback, we understand how important continuity and design are when transitioning from long-term Nest devices. While our product may differ in appearance and battery requirements, it was designed to meet updated performance standards and integrate seamlessly with modern smart home systems. We’re committed to delivering reliable and innovative solutions, and we’ll be sure to share your comments with our product team. - Maria FirstAlert

  • Pros mentioned:
    Installation ease

    Great smart smoke detector

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    It is a great replacement for a regular smoke detector, easy to setup and works with Google smart home devices.

    I would recommend this to a friend
  • Pros mentioned:
    Installation ease

    Works with Google Nest Protect

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    We wanted a Smoke and Carbon Monoxide Detector that was compatible with our Google Nest devices. The First Alert device was quickly delivered by Best Buy and was easy to install

    I would recommend this to a friend
  • Pros mentioned:
    Installation ease

    Replaces Expired Nest Protect

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I bought this to replace a Nest Protect that expired. All the features — Lower price — Easy setup

    I would recommend this to a friend
  • Cons mentioned:
    Sensitivity

    could be better

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I really did appreciate the motion sensor aspects from the old nest protect unlike some others have mentioned. Also wasn't thrilled that it is 7 year life span versus 10 years like the Nest protect. Haven't seen the sensitivity as others have mentioned yet and hoping it doesn't pop up.

    I would recommend this to a friend
    • Brand response from FirstAlertProductExpert
      Posted .

      Hi averageAbe, thank you for taking the time to share your feedback regarding the SC5. The SC5 is designed to be a functional replacement for the Nest Protect, offering many of the same core safety features, including interconnectivity, voice alerts with location, and color-coded LED status indicators. However, it does not currently include a path lighting feature like Nest Protect’s Pathlight. That said, we are actively evaluating the addition of a motion-sensing night light in a future version of the product. - Maria FirstAlert

  • Pros mentioned:
    Installation ease

    Easy to install

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    Posted . Owned for 1 week when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Super easy to install and set up. Love that integrates with existing system.

    I would recommend this to a friend
  • Pros mentioned:
    Installation ease

    Great Nest Protect replacement

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    Posted . Owned for 2 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Very easy to install as a replacement for Nest Protect

    I would recommend this to a friend
  • Pros mentioned:
    Installation ease

    Perfect

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    Posted . Owned for less than 1 week when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Perfect. Easy to install. Can use existing wiring.

    I would recommend this to a friend
  • Pros mentioned:
    Installation ease

    Office Manager

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Very easy to install and customer was very satisfied.

    I would recommend this to a friend

  • I'd buy this again for sure

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    Posted . Owned for 2 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Unlike some reviewers, I find the build quality of this product better than OK. I do miss the 'night light' feature of the old Nest sensor, but that's not the end of the world really. This is located in our Bedroom and we have had no false alarms after a month.

    I would recommend this to a friend

  • Replace my Nest Smoke Detector

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I purchased this to replace my Nest alarm and chose it specifically for Google Home compatibility. Installation was straightforward, it integrated easily, and it provides reliable smoke and carbon monoxide protection. Great value and a solid replacement option.

    I would recommend this to a friend

  • Works well

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    My home remodel allows me to have the smoke alarms hardwired now. I no longer have to worry about battery runs out and hearing the non-stop chirp.

    I would recommend this to a friend
  • Pros mentioned:
    Installation ease

    Great replacement for nest protect

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Great replacement for Nest Protect. Easy to install, convenient adaptors for old nest protects and app works well.

    I would recommend this to a friend
  • Pros mentioned:
    Installation ease

    Easy replacement for Nest

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Easy set up easy install. I’ve purchased several of these to replace the Nest devices, which have been abandoned.

    I would recommend this to a friend

  • Good product

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    So far so good, we did get a false positive early on but it has been good so far. The false positive is why I am giving it only 4 stars as I had to drive 80 miles back to the house.

    I would recommend this to a friend
  • Pros mentioned:
    Installation ease

    Good Smart Smoke Alarm

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This is a good replacement for the nest protect alarm. It was easy to set up and connect to my smart home.

    I would recommend this to a friend
  • Pros mentioned:
    Overall performance

    Yes!!

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    Posted . Owned for less than 1 week when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Love it! The best one I ever got!!! I will keep getting this one

    I would recommend this to a friend
  • Pros mentioned:
    Installation ease

    Good easy to install

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Easy install and hook right up to wi fi no issue the box is nice and clean

    I would recommend this to a friend
Page 5, Showing 81-100 of 152 reviews
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