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First Alert SCO501CN-3ST Wireless Interconnected Combination Smoke and Carbon Monoxide Alarm with Voice Location, Battery Operated (pack of 1)

4.6 4.6 out of 5 stars 4,682 ratings

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SCO501CN-3ST
Alarm

Purchase options and add-ons


About this item

  • The front cover design of the alarm may vary but product function remains the same.
  • Battery operated smoke and carbon monoxide alarm can be installed easily
  • Connects multiple alarms together for wireless safety network
  • Voice alarm gives clear indication of where the problem is located
  • Features photoelectric smoke sensor and electrochemical CO sensor
  • One button silences a false alarm and tests the unit. Loud 85 decibel alarm
  • NOTE: Kindly refer to the user manual provided as a PDF manual in the product description section

Customer ratings by feature

Motion detection
5.0 5.0
Noise level
4.5 4.5
Easy to install
4.4 4.4
Battery life
4.3 4.3

Frequently bought together

$42.75
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From the manufacturer

First Alert
What is carbon monoxide?

Common sources of Carbon Monoxide

Furniture

Dryer Vent

Chimney

What does the beep mean?

4 beeps and a pause

1 beep every minute

5 beeps every minute

Emergency: Carbon monoxide has been detected. Move to fresh air and call 911.

Low battery: It's time to replace the batteries in your carbon monoxide alarm.

End of life: It's time to replace your carbon monoxide alarm.

Recommended alarm placement

Product guides and documents

Looking for specific info?

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here [PDF ]

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First Alert SCO501CN-3ST Wireless Interconnected Combination Smoke and Carbon Monoxide Alarm with Voice Location, Battery Operated (pack of 1)


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Product Description

The First Alert SCO501CN 3ST Combination Smoke and Carbon Monoxide Alarm with Voice Location detects both smoke and carbon monoxide in a single device. The alarm interconnects with up to 18 other First Alert enabled alarms in your home to create a wireless safety network. The photoelectric smoke sensor is designed to reduce false alarms from cooking smoke or shower steam while remaining sensitive to real danger. The advanced electrochemical CO sensor detects carbon monoxide leaks from multiple sources, including faulty fuel burning appliances. A loud 85 decibel siren and a voice alarm with 11 programmable locations indicate where and what the threat is. EZ access battery drawer, no need to remove alarm from ceiling to change battery.

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First Alert SCO501CN-3ST Wireless Interconnected Combination Smoke and Carbon Monoxide Alarm with Voice Location, Battery Operated (pack of 1)
FIRST ALERT First Alert SCO501CN-3ST Wireless Interconnected Combination Smoke and Carbon Monoxide Alarm with Voice Location, Battery Operated (pack of 1)
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Price$42.75$42.99$39.98$33.12$45.99-19% $109.99
List:$135.99
Delivery
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Customer Ratings
Easy to install
4.4
4.6
4.5
4.8
4.5
Battery life
4.3
4.5
4.2
4.2
Value for money
4.1
4.6
4.2
4.3
Alexa integration
3.2
3.2
3.6
Sold By
Amazon.com
X-Sense US
Amazon.com
Amazon.com
X-Sense US
Amazon.com
power source
Battery Powered
Battery Powered
Battery Powered
Battery Powered
Battery Powered
Battery Powered
sensor type
electrochemical,photoelectric
Electrochemical, Photoelectric
Photoelectric, Electrochemical
Photoelectric
Photoelectric, Electrochemical
Electrochemical
style
SCO501CN-3ST
RF Interconnected Model (with Voice Location)
Updated Model
Smoke, CO
Wi-Fi Connected Model
simple
alarm
Audible
Audible
Combination Smoke and Carbon Monoxide Alarm
Smoke, CO
Audible
Audible
weight
0.2 pounds
1 pounds
0.52 pounds
0.01 ounces

Important information

Bulb Voltage

120 volts

Customer reviews

4.6 out of 5 stars
4.6 out of 5
4,682 global ratings

Customers say

Customers like the ease of set up and installation of the gas smoke fire alarm. They mention that it's easy to mount and program, and the voice and instructions are very clear. They are also satisfied with the performance, saying that it appears to work well. Customers are also happy with detection. However, some customers differ on quality, connectivity, volume, value, and battery life.

AI-generated from the text of customer reviews

260 customers mention205 positive55 negative

Customers find the gas smoke fire alarm easy to set up and install. They say it's a breeze to program, and can be assembled in less than five minutes. Customers also appreciate that the voice and instructions are very clear.

"...SCO501CN and thus far after a few weeks, no false alarms and they all installed easily (and into the same ceiling base as the old ones)...." Read more

"...UPDATE 10/25/2009: Installation of the first two (smoke + CO) went very smoothly...." Read more

"...They were very easy to set up and get connected and named...." Read more

"...Setting them up was pretty straight-forward, except the instructions could have been laid out a bit better...." Read more

207 customers mention164 positive43 negative

Customers like the performance of the gas smoke fire alarm. For example, they say it works well, the original detectors worked great for 9 years, and it tested flawlessly. That said, they're in good working order and have no unexpected and sleep-interrupting problems.

"...So far, no false alarms and the units are working fine. I have read the "one star" reviews and people have had false alarms after a period of time...." Read more

"Works great, goes off almost every time I cook (kidding, sort of - the glass of my toaster oven is opaque). Seriously, don't skimp on these things...." Read more

"...This is a very useful feature, since an alarm in the basement may not be heard by sleeping individuals in an upstairs bedroom...." Read more

"...We had already used them for about 9 months. Since then they have worked great and are easy to program...." Read more

159 customers mention111 positive48 negative

Customers are mixed about the connectivity of the gas smoke fire alarm. Some mention that the interconnect is great and the voice is helpful, while others say that it seems to lose connectivity a few months after purchase. They also say that the wireless interconnect does not reach their hallway.

"...alarms, voice instead of crazy beeps when there is a problem, and interconnected...." Read more

"...They were very easy to set up and get connected and named...." Read more

"...These units cannot connect to my Ring Alarm system. That is fine with me as I discuss in my review of the ZCOMBO model...." Read more

"...It is a 2-in-1 device, giving your home protection from both smoke and carbon monoxide...." Read more

67 customers mention56 positive11 negative

Customers like the detection of the gas smoke fire alarm. They mention it's a great smoke and carbon monoxide detector, an excellent upgrade to plain old smoke detectors, and has photoelectric smoke detection. The detector is easy to set up and is one of the best fire alarms on the market.

"...I think that the First Alert SCO500B is a good smoke/CO alarm and I would recommend this model...." Read more

"...Great product covers both smoke and carbon monoxide while using a voice alarm." Read more

"...4. Photoelectric smoke detection, instead of ionization type. (Prefer a unit with both types but found none)*..." Read more

"...To top it off it also says the location of the smoke or carbon monoxide. I haven't had it go off for anything yet but testing it...." Read more

206 customers mention77 positive129 negative

Customers are mixed about the quality of the gas smoke fire alarm. Some mention that the electric technology helps prevent false alarms like those caused by cooking. The interconnected alarms provide immediate notification from anywhere in the house. However, others say that they have had three failed units and nine defective devices.

"...I thought that was odd. Within a few seconds it triggered complaining about smoke (not CO)...." Read more

"...So far, no false alarms and the units are working fine. I have read the "one star" reviews and people have had false alarms after a period of time...." Read more

"...You will have to purchase anchors to mount these. The ones included are so flimsy that they buckle under the stress of insertion into the hole you..." Read more

"...Then one of the bedroom alarms started alarming without any speaking as to whether it was smoke or carbon monoxide...." Read more

124 customers mention70 positive54 negative

Customers are mixed about the volume of the gas smoke fire alarm. Some mention that it works great, produces a loud, 85db alarm, plus a talking alarm for added safety. However, others say that the verbal instructions blare at full volume, the voice alert from all the alarms becomes jumbled, and the recording is nails on a chalkboard.

"...What we liked was: no false alarms, voice instead of crazy beeps when there is a problem, and interconnected...." Read more

"...Setting up is a bit of a pain because the verbal instructions blare at full volume, but that is a one time thing...." Read more

"...The OneLink produces a loud, 85db alarm, plus a talking alarm for added safety...." Read more

"Not the easiest to program but is very loud and voice warning is great." Read more

78 customers mention51 positive27 negative

Customers are mixed about the value of the gas smoke fire alarm. Some mention that it's a good unit at a reasonable price, and the One-Link system works. They also appreciate that it uses inexpensive and easy to purchase AA batteries. However, others say that it is not worth the money and a colossal waste of money.

"...Nest Protect units, I can get a good smoke/CO alarm system at a reasonable price...." Read more

"...and carbon monoxide sensors installed with it, as they were extremely expensive...." Read more

"...and never had to depend on these items, but it's the cheapest insurance you can buy." Read more

"...are very clear where the issue is within the house... Well worth the money if looking to upgrade." Read more

73 customers mention37 positive36 negative

Customers are mixed about the battery life of the gas smoke fire alarm. Some mention that the batteries have lasted 9 months so far with no problems, while others say that they are nearly dead. The alarms do have a talking low battery alert, which is supposed to sound every 5 minutes. However, some customers also mention that it does not take wall power and is battery-only.

"...The alarms do have a talking low battery alert, which is supposed to sound every 5 hours or so when the batteries are in need of replacement...." Read more

"After about 7 years these units must be replaced due to the C02 sensor wears out...." Read more

"...Batteries are in the side for easy access" Read more

"...However, they will drive you up the wall. The battery life is awful—I’ve had to replace batteries in two devices already and they’re barely a year..." Read more

Great product - just not the one that is advertised!
5 Stars
Great product - just not the one that is advertised!
So I spent way too many hours trying to figure out what happened. We have several SCO501CN in our home that failed after several years and they worked so well, I wanted to replace each one of them. What we liked was: no false alarms, voice instead of crazy beeps when there is a problem, and interconnected. I ordered five from Amazon (Amazon.com as the seller) and was surprised to get an entirely different model. What was sent was the SCO500 which hardly appears anywhere on the internet. I did find it on First Alert's website however it wasn't clear that it was a voice model, which is what we really liked about the SCO501CN. The packaging also says nothing about voice. There is even a sticker with a bar code that says SCO 501CN on some of them, right below where the packaging clearly indicates that this is the SCO500...so weird. However, I opened one up and low and behold, it was voice, and CO, and smoke and interconnected, exactly what we wanted. It appears that the US has updated their requirements (UL STD 217) for smoke detectors due to the increasing number of lithium battery caused fires, and these models are consistent with this standard.So hopefully the new SCO500 works as well as the SCO501CN and thus far after a few weeks, no false alarms and they all installed easily (and into the same ceiling base as the old ones). Hopefully Amazon will update the listing for this at some point. I was told in November by their customer service that they would however still nothing yet.
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Top reviews from the United States

Reviewed in the United States on June 17, 2021
Style: SCO500BPattern Name: AlarmVerified Purchase
40 people found this helpful
Report
Reviewed in the United States on December 29, 2023
Style: SCO501CN-3STPattern Name: AlarmVerified Purchase
Customer image
5.0 out of 5 stars Great product - just not the one that is advertised!
Reviewed in the United States on December 29, 2023
So I spent way too many hours trying to figure out what happened. We have several SCO501CN in our home that failed after several years and they worked so well, I wanted to replace each one of them. What we liked was: no false alarms, voice instead of crazy beeps when there is a problem, and interconnected. I ordered five from Amazon (Amazon.com as the seller) and was surprised to get an entirely different model. What was sent was the SCO500 which hardly appears anywhere on the internet. I did find it on First Alert's website however it wasn't clear that it was a voice model, which is what we really liked about the SCO501CN. The packaging also says nothing about voice. There is even a sticker with a bar code that says SCO 501CN on some of them, right below where the packaging clearly indicates that this is the SCO500...so weird. However, I opened one up and low and behold, it was voice, and CO, and smoke and interconnected, exactly what we wanted. It appears that the US has updated their requirements (UL STD 217) for smoke detectors due to the increasing number of lithium battery caused fires, and these models are consistent with this standard.

So hopefully the new SCO500 works as well as the SCO501CN and thus far after a few weeks, no false alarms and they all installed easily (and into the same ceiling base as the old ones). Hopefully Amazon will update the listing for this at some point. I was told in November by their customer service that they would however still nothing yet.
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Customer image Customer image Customer image
Customer imageCustomer imageCustomer image
8 people found this helpful
Report
Reviewed in the United States on November 29, 2023
Style: SCO501CN-3STPattern Name: AlarmVerified Purchase
3 people found this helpful
Report

Top reviews from other countries

Sullgome
5.0 out of 5 stars Five Stars
Reviewed in Canada on February 5, 2017
Style: SCO500BPattern Name: AlarmVerified Purchase