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First Alert CO605 Plug-In Carbon Monoxide Detector with Battery Backup , White

4.7 4.7 out of 5 stars 17,755 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Carbon Monoxide Detectors by FIRST ALERT

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1-Pack
Alarm

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About this item

  • Keep your family safe with this easy to use plug in carbon monoxide alarm; It works with any standard outlet and also has a battery backup for continuous monitoring of Carbon Monoxide levels, even if there's a power failure
  • Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room
  • Simple to use, with a single test/silence button; a loud 85 decibel alarm sounds when Carbon Monoxide levels reach dangerous levels. Low battery signal mute, quiets low battery signal for upto 8 hours
  • To ensure complete protection make sure to place one on each level of your home and in each bedroom
  • 7 year limited warranty; Equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety
  • All first alert CO alarms are rigorously tested to meet UL standards. Item length is 3.4 inches , item width is 1.38 inches and item height is 5 inches
  • Loud 85-decibel alarm sounds when CO levels are elevated
See more product details

Customer ratings by feature

Easy to install
4.7 4.7
Easy to use
4.6 4.6
Easy to read
4.6 4.6
Accuracy
4.4 4.4

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First Alert CO605 Plug-In Carbon Monoxide Detector with Battery Backup , White
FIRST ALERT First Alert CO605 Plug-In Carbon Monoxide Detector with Battery Backup , White
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Price-38% $28.99
List:$46.99
-14% $117.09
List:$135.99
$45.99$26.99$26.00-13% $59.99
List:$69.21
Delivery
Get it as soon as Monday, Mar 18
Get it as soon as Monday, Mar 18
Get it as soon as Monday, Mar 18
Get it as soon as Monday, Mar 18
Get it as soon as Monday, Mar 18
Get it as soon as Monday, Mar 18
Customer Ratings
Easy to install
4.7
4.5
5.0
4.6
4.7
4.6
Easy to read
4.6
4.5
4.8
4.6
5.0
4.4
Accuracy
4.4
4.4
4.8
4.6
4.4
4.2
Easy to use
4.6
4.2
4.6
4.8
4.6
Value for money
4.3
4.7
3.6
Sold By
Amazon.com
Amazon.com
KH Alert
SITERWELL
Colorwell
Hembisen.
power source
Corded Electric
Battery Powered
Corded Electric
Battery Powered
AC
Plug-and-play
sensor type
Electrochemical
Electrochemical
Electrochemical
Electrochemical
Photoelectric
Electrochemical
style
Plug in Alarm with Battery Backup
simple
modern
Standard Model
Decibel,Safety
3 Packs
alarm
Carbon Monoxide
Audible
Audible
Audible
Visual
Audible
weight
0.26 pounds
0.01 ounces
4.5 ounces

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

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 CO605 Plug-In Carbon Monoxide Detector with Battery Backup , White


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Product guides and documents

Product Description

The First Alert CO605 plug in carbon monoxide alarm with battery backup uses an electrochemical carbon monoxide sensor the most accurate technology available. The alarm easily plugs into any standard outlet with no additional mounting. Battery backup ensures alarm Works even during power outages. Mute button silences any nuisance alarms. Single button also tests alarm functions. Carbon monoxide alarm utilizes electrochemical sensor for increased accuracy. 7 year limited. Co alarm meets UL standards. There are no complicated displays or settings to navigate.

Top Brand: FIRST ALERT

Highly Rated
4.6/5 star rating from 100K+ customer ratings
Trending
100K+ orders for this brand in past 3 months
Low Returns
Customers usually keep items from this brand

Important information

Bulb Voltage

120 volts

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Customer reviews

4.7 out of 5 stars
4.7 out of 5
17,755 global ratings

Customers say

Customers like the quality, ease of installation, value, and protection of the home lighting accessory. For example, they mention it's reliable, easy to use, and provides continuous protection even during power outages. Customers are also impressed with the packaging, and performance. That said, some complain about the noise, and have mixed opinions on the battery.

AI-generated from the text of customer reviews

563 customers mention533 positive30 negative

Customers find the installation process of the home lighting accessory to be easy. They mention that the product comes with adequate directions to get the unit set up for use, and it easily plugs into a wall. Customers also appreciate the unobtrusive design of the product.

"...The white design seamlessly blends with my home decor, making it unobtrusive. The compact size ensures it doesn't take up much space...." Read more

"The product was easy to install. Test alert worked fine...." Read more

"...This is extremely easy to install. The previous one has lasted many years. You can test the sound; it is very loud...." Read more

"Easy to install, good product" Read more

428 customers mention348 positive80 negative

Customers like the performance of the home lighting accessory. They mention that it works well so far, has no problems since install, and has immediate functionality straight out of the box. Some say that the product is accurate and easy to install, while others say that it's not defective.

"...The ease of setup and the immediate functionality straight out of the box impressed me...." Read more

"The product was easy to install. Test alert worked fine...." Read more

"Works great" Read more

"Alarm works good (and just like the last one I had)." Read more

362 customers mention306 positive56 negative

Customers like the quality of the home lighting accessory. They say it has a good build quality, is reliable, and easy to install and use. Some customers say that the previous one has lasted many years and that it provides peace of mind with a battery backup.

"...in the brand, and I appreciate the commitment to delivering high-quality products that prioritize safety... at a reasonable price...." Read more

"...This is extremely easy to install. The previous one has lasted many years. You can test the sound; it is very loud...." Read more

"Easy to install, good product" Read more

"...Hopefully we’ll never need them but the extra peace of mind well worth it." Read more

318 customers mention318 positive0 negative

Customers appreciate the value of the smoke detector. They say it's a great detector for the price and provides important protection that should be standard in every home. Customers also mention that the unit arrived on time, in good condition, and with a good battery.

"...delivering high-quality products that prioritize safety... at a reasonable price...." Read more

"...They do not have infinite lifetimes, but they are inexpensive and last 5-7 years...." Read more

"Great price for a nice carbon monoxide detector! I especially like that it doesn’t need to be mounted up high on wall." Read more

"...Best price for a good brand, for a must have safety item." Read more

81 customers mention77 positive4 negative

Customers are satisfied with the protection provided by the smoke alarm. They mention that it helps keep them safe, and the added battery backup ensures continuous protection even during power outages. Customers also appreciate the easy installation and the ability to protect from carbon monoxide.

"...that the detector is ready to go, and the added battery backup ensures continuous protection even during power outages...." Read more

"...Carbon Monoxide Detectors are not fun or exciting, but important for your safety. I bought two because I am selling my home...." Read more

"...I ordered a new one and no problems. Keeps your family safe." Read more

"This will help keep you safe... plug one in every bedroom who knows how accurate it is - it's made by first alert so I assume it works" Read more

70 customers mention65 positive5 negative

Customers are satisfied with the packaging of the product. They mention that it is packaged really well, and it arrived quickly. Some say that it was easy to place in the mail and was already assembled.

"So fast, exactly the same model as we have had for 25 years!! Thanks" Read more

"Fast shipping" Read more

"Not the easiest clam-shell to get into, but once in, minimal packaging. Comes with the 9v back-up battery...." Read more

"...Would highly recommend. Also, it is super fast and easy to install." Read more

241 customers mention155 positive86 negative

Customers are mixed about the battery of the home lighting accessory. Some mention that it's easy to plug-in and it has a battery back-up, giving them peace of mind. Others say that the battery in these are no good right out of the box, and that it came with a dead 9-volt battery.

"...Somethings I guess you just have to trust. Easy install. Battery backup." Read more

"...Also, 9V batteries are stupid expensive-- I am switching to a 2 AA model." Read more

"...AC power with battery backup for extra safety is great. Covered every bedroom in our home without breaking the bank. Came with batteries as a plus...." Read more

"...Same brand. They work and have battery backup!" Read more

117 customers mention25 positive92 negative

Customers are not happy with the noise the alarm makes. Some mention that it emits a steady beeping, and some say it doesn't sound an alarm until the CO level reaches 200+ ppm. Some say that the alarm is loud and needs a battery.

"...annoying thing is when they finally die, they make periodic sequences of 4 very loud chirps...." Read more

"...Except it wasn't. Two days later, the random beeping resumed - and we had to peel our dog off the ceiling...." Read more

"...(9V) was "dead", I found that out after installing it, then the unit chirping...." Read more

"...the alarm (they recommend you do this weekly), and the sound is definitely loud enough to wake sleepers...." Read more

Easy to use. Already a year old. Nothing fancy.
4 Stars
Easy to use. Already a year old. Nothing fancy.
These were a good value but as you can see from the pics, they are already over a year old on arrival. I didn't have any issues at all putting the batteries in. Would have given five stars if they weren't a year old. All three were dated August 2019. Same manufacturers lot.
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Top reviews from other countries

Mine
1.0 out of 5 stars Disappointed :( :( :(
Reviewed in Canada on March 8, 2019
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