Buy new:
$17.99
FREE delivery Friday, August 16 on orders shipped by Amazon over $35
Ships from: Amazon.com
Sold by: Amazon.com
$17.99
FREE pickup Friday, August 16 on orders shipped by Amazon over $35
Or Prime members get FREE pickup Wednesday, August 14. Order within 6 hrs 54 mins.

1.27 mi | ASHBURN 20147

How pickup works
Pick up from nearby pickup location
Step 1: Place Your Order
Select the “Pickup” option on the product page or during checkout.
Step 2: Receive Notification
Once your package is ready for pickup, you'll receive an email and app notification.
Step 3: Pick up
Bring your order ID or pickup code (if applicable) to your chosen pickup location to pick up your package.
In Stock
$$17.99 () Includes selected options. Includes initial monthly payment and selected options. Details
Price
Subtotal
$$17.99
Subtotal
Initial payment breakdown
Shipping cost, delivery date, and order total (including tax) shown at checkout.
Sold by
Amazon.com
Sold by
Amazon.com
Returns
30-day refund/replacement
30-day refund/replacement
This item can be returned in its original condition for a full refund or replacement within 30 days of receipt.
Returns
30-day refund/replacement
This item can be returned in its original condition for a full refund or replacement within 30 days of receipt.
Payment
Secure transaction
Your transaction is secure
We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more
Payment
Secure transaction
We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more

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

Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Carbon Monoxide Detectors by FIRST ALERT

$17.99 with 62 percent savings
List Price: $46.99

The List Price is the suggested retail price of a new product as provided by a manufacturer, supplier, or seller. Except for books, Amazon will display a List Price if the product was purchased by customers on Amazon or offered by other retailers at or above the List Price in at least the past 90 days. List prices may not necessarily reflect the product's prevailing market price.
Learn more
Get Fast, Free Shipping with Amazon Prime
FREE Returns
Get $10 off instantly: Pay $7.99 $17.99 upon approval for the Amazon Store Card. No annual fee.
Available at a lower price from other sellers that may not offer free Prime shipping.
{"desktop_buybox_group_1":[{"displayPrice":"$17.99","priceAmount":17.99,"currencySymbol":"$","integerValue":"17","decimalSeparator":".","fractionalValue":"99","symbolPosition":"left","hasSpace":false,"showFractionalPartIfEmpty":true,"offerListingId":"L0uz4YommU0YlVb1NhHDD08hJae6ttOgt7hR9MAto3vDJKAjp4XgX7gnd2K3w0en6Ruc3M6nARo6i%2FD00M687FAIkVjegnJ%2FRaxvEt3EVTtn8rtQED6Vva81q8%2BH0XD0K0J8omKgc0s%3D","locale":"en-US","buyingOptionType":"NEW","aapiBuyingOptionIndex":0}, {"displayPrice":"$15.99","priceAmount":15.99,"currencySymbol":"$","integerValue":"15","decimalSeparator":".","fractionalValue":"99","symbolPosition":"left","hasSpace":false,"showFractionalPartIfEmpty":true,"offerListingId":"L0uz4YommU0YlVb1NhHDD08hJae6ttOgL1tLkKOXYchrcD6XjgAzCGM1R6fwnkzkmkYODm%2FS86v7OXTGYZ5bVttZwkP4Cths68AS3CbrGH6RVC%2FNmgGCDmlih%2FglVVDwZYlkfOsUSYipvA%2Ba%2FEe4xnCJkjWWTV2mmzVoPafkhky%2FrUh%2B8omGn4EO6oanJgjY","locale":"en-US","buyingOptionType":"USED","aapiBuyingOptionIndex":1}],"desktop_buybox_group_2":[{"displayPrice":"$17.99","priceAmount":17.99,"currencySymbol":"$","integerValue":"17","decimalSeparator":".","fractionalValue":"99","symbolPosition":"left","hasSpace":false,"showFractionalPartIfEmpty":true,"offerListingId":"L0uz4YommU0YlVb1NhHDD08hJae6ttOgt7hR9MAto3vDJKAjp4XgX7gnd2K3w0en6Ruc3M6nARo6i%2FD00M687FAIkVjegnJ%2FRaxvEt3EVTtn8rtQED6Vva81q8%2BH0XD0K0J8omKgc0s%3D","locale":"en-US","buyingOptionType":"PICKUP","aapiBuyingOptionIndex":2}]}

Purchase options and add-ons

Brand FIRST ALERT
Style Plug in Alarm with Battery Backup
Power Source Corded Electric
Color White
Product Dimensions 1.38"D x 5"W x 3.4"H
Item Weight 4.2 Ounces
Alarm Carbon Monoxide
Upper Temperature Rating 105 Degrees Fahrenheit
Sensor Type Electrochemical
Global Trade Identification Number 00029054000682

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

Frequently bought together

This item: First Alert CO605 Plug-In Carbon Monoxide Detector with Battery Backup , White
$17.99
Get it as soon as Friday, Aug 16
In Stock
Ships from and sold by Amazon.com.
+
$19.99
Get it as soon as Friday, Aug 16
In Stock
Ships from and sold by Amazon.com.
+
$17.89
Get it as soon as Friday, Aug 16
In Stock
Ships from and sold by Amazon.com.
Total price:
To see our price, add these items to your cart.
Details
Added to Cart
Choose items to buy together.

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 ]

Feedback

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


Found a lower price? Let us know. Although we can't match every price reported, we'll use your feedback to ensure that our prices remain competitive.

Where did you see a lower price?

Price Availability
/
/
/
/
Please sign in to provide feedback.

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 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
100K+ customers rate items from this brand highly
Trending
100K+ orders for this brand in past 3 months
Low Returns
Customers usually keep items from this brand

Compare with similar items

This Item
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
Recommendations
Plug-in Type Carbon Monoxide Alarm, CO Detector Monitor with LED Digital Display and Voice Alert for Home/Kitchen/Bedroom,UL2034 - 2 Pack
dummy
X-Sense Carbon Monoxide Detector Alarm with Digital LCD Display, Replaceable Battery CO Alarm Detector with Peak Value Memory, XC01-R
dummy
Plug In Carbon Monoxide Detectors,Wall CO Alarm With Voice & LEDs Digital Display Accurate Easy To Read Vzmcov CO Monitoring Alarm And Test Button Dor Home Basement Kitchen Office Hotel Bedroom-2 Pack
dummy
Siterlink Carbon Monoxide Detector, 10-Year Life Carbon Monoxide Alarm, Replaceable Battery CO Detector with LCD Digital Display and Test Button, 3 LED Lights CO Alarm for Home, GS828C-D, 1 Pack
dummy
Plug-in Type Carbon Monoxide Alarm, CO Detector Monitor with LED Digital Display and Voice Alert for Home/Kitchen - 2 Pack
Details
Added to Cart
Details
Added to Cart
Details
Added to Cart
Details
Added to Cart
Details
Added to Cart
Details
Added to Cart
Price-62% $17.99
List:$46.99
$45.99$28.99$45.99-5% $26.59
Typical:$27.99
$45.99
Delivery
Get it as soon as Friday, Aug 16
Get it as soon as Friday, Aug 16
Get it as soon as Friday, Aug 16
Get it as soon as Friday, Aug 16
Get it as soon as Friday, Aug 16
Get it as soon as Friday, Aug 16
Customer Ratings
Easy to install
4.7
5.0
4.6
4.9
4.8
4.7
Easy to read
4.6
4.8
4.6
4.7
4.7
5.0
Accuracy
4.4
4.8
4.4
4.4
Value for money
4.3
4.6
5.0
4.6
Easy to use
4.6
4.8
4.9
Sold By
Amazon.com
KH Alert
X-Sense US
Docalon
Siterlink
GEALDEN
power source
Corded Electric
Corded Electric
Battery Powered
Corded Electric
Battery Powered
AC
sensor type
Electrochemical
Electrochemical
Electrochemical
Electrochemical
Electrochemical
Electrochemical
style
Plug in Alarm with Battery Backup
modern
Digital
1 pack of 2 pcs
alarm
Carbon Monoxide
Audible
Audible
Audible
Audible
Visual
weight
4.2 ounces
0.2 pounds
0.37 pounds
0.26 pounds

Important information

Bulb Voltage

120 volts

Customer reviews

4.7 out of 5 stars
18,898 global ratings

Customers say

Customers like the quality, ease of installation, and performance of the gas smoke fire alarm. They mention that it helps keep them and their family safe, and is worth the peace of mind. They also appreciate the battery backup, value, and performace. However, some customers have reported issues with the battery life and noise.

AI-generated from the text of customer reviews

604 customers mention "Performance"537 positive67 negative

Customers like the performance of the gas smoke fire alarm. For example, they mention it works well, is very usable, and has been working for years with no issues. Some appreciate the commitment to delivering high-quality products that prioritize safety. Overall, most are happy with the performance and quality of the product.

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

"Very usable and just the perfect side." Read more

"...It was easy to install, looks unobtrusive, and works great with regard to the 'test' procedure...." Read more

"Nice product and made well. Works great and small not bulky. well worth the price." Read more

585 customers mention "Ease of installation"554 positive31 negative

Customers find the installation of the gas smoke fire alarm incredibly easy. They say the directions are adequate and the product is functional and convenient right out of the box.

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

"...It was easy to install, looks unobtrusive, and works great with regard to the 'test' procedure...." Read more

"...Installation was simple. Just put the batteries in and plug in to the wall...." Read more

"Pleased with product. I feel great value. Easy setup. Feeling safe and protected." Read more

323 customers mention "Value"323 positive0 negative

Customers are satisfied with the value of the gas smoke fire alarm. They mention that it is a great detector for the price, and a cheap lifesaver.

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

"...Highly recommend this for features and the price, which was reasonable as far as these detectors go." Read more

"Nice product and made well. Works great and small not bulky. well worth the price." Read more

"...Use a generator while home or away? It’s a must. These are cheap life saving devices." Read more

258 customers mention "Quality"191 positive67 negative

Customers like the quality of the gas smoke fire alarm. They say it's worth the peace of mind, and easy to use. Some say the unit seems solid, and is worth the price. Overall, most are happy with the product's quality and value.

"...Alert CO605 Carbon Monoxide Detector is a stellar product that offers peace of mind, reliability, and ease of use...." Read more

"Very usable and just the perfect side." Read more

"Our CO detector got knocked out of the electric plug in, and the prongs broke...." Read more

"Nice product and made well. Works great and small not bulky. well worth the price." Read more

224 customers mention "Battery backup"158 positive66 negative

Customers like that the gas smoke fire alarm comes with a battery backup. They say it's nice to have a backup battery for when power is out. Some say the detector is electric with 'battery back up'.

"...I knew it was the right detector because it included the 9 volt battery, and the thing worked immediately on plugging it into the wall...." Read more

"Replaced the outdated one. Like that it has a battery backup!" Read more

"...I didn't realize it until I read further, and realized the battery was already old and needed to be replaced. I'm not pleased about that." Read more

"Super easy install and it is nice it comes with a 9V backup battery. I obviously have not verified that it works, but I imagine it will...." Read more

92 customers mention "Safety"87 positive5 negative

Customers are satisfied with the safety of the gas smoke fire alarm. They mention that it is a great lifesaver, easy to install, and helps keep them and their family safe. The added battery backup ensures continuous protection even during power outages. Some say that the device could save their life and gives them peace of mind.

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

"Pleased with product. I feel great value. Easy setup. Feeling safe and protected." Read more

"...Very easy to set up with battery. Convenient testing button. Feel safe with this detector in operation." 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

135 customers mention "Noise"30 positive105 negative

Customers are dissatisfied with the noise produced by the gas smoke fire alarm. They mention that it chirps every now and then, and some say that it still beeps after they reset it. Some customers also say that the unit doesn't sound an alarm until the CO level reaches 200+ ppm. The battery backup unit will chirping when the battery is dead.

"...The last one kept beeping and I didn't realize it until I read further, and realized the battery was already old and needed to be replaced...." Read more

"...The first one lasted 10 years or I should say the end of life alarm started beeping." Read more

"End of life alarm began to sound. (finally figured out what the individual "beeps" meant)." Read more

"Sound quality, and easy to use very good product" Read more

96 customers mention "Battery life"12 positive84 negative

Customers are dissatisfied with the battery life of the gas smoke fire alarm. They mention that it lasted only 5 years, failed within 2 months of purchase, and stopped working at 32 days. Some say that the entire unit is unusable after the battery dies.

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

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

"...Figured it was a low battery alarm. After switching batteries and it kept going off, read the label that 4 beeps was the CO alarm going off!..." Read more

"...intermittent chirping from the plugged in alarm indicating it had a low battery. Of course, it woke up the cats and could not be ignored...." Read more

Must Have
5 out of 5 stars
Must Have
Put these in every bedroom. Easy to install, test is easy to understand. Sleep way easier knowing the family is safe from CO2. Seem to be good quality. Easy to understand.
Thank you for your feedback
Sorry, there was an error
Sorry we couldn't load the review

Top reviews from the United States

Reviewed in the United States on January 24, 2024
Size: 1-PackPattern Name: AlarmVerified Purchase
The inclusion of a 9V battery right out of the box is a thoughtful touch. It gives me peace of mind knowing that the detector is ready to go, and the added battery backup ensures continuous protection even during power outages.

I tested the detector when it arrived, and everything checked out. The ease of setup and the immediate functionality straight out of the box impressed me. The clear instructions provided made the installation process a breeze.

As a consumer, the First Alert brand has always been synonymous with reliability and trust. This CO detector is no exception. It reinforces my confidence in the brand, and I appreciate the commitment to delivering high-quality products that prioritize safety... at a reasonable price.

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

In summary, the First Alert CO605 Carbon Monoxide Detector is a stellar product that offers peace of mind, reliability, and ease of use. I highly recommend it to anyone in need of a top-notch carbon monoxide detector. Five stars – well deserved!
10 people found this helpful
Report
Reviewed in the United States on July 23, 2024
Size: 1-PackPattern Name: AlarmVerified Purchase
Very usable and just the perfect side.
Reviewed in the United States on May 3, 2024
Size: 1-PackPattern Name: AlarmVerified Purchase
Bought this smoke detector for our son's college dorm room as a 'spare' in case the supplied detector malfunctioned. It was easy to install, looks unobtrusive, and works great with regard to the 'test' procedure. Of course, we pray it never goes off from carbon monoxide, but we like the assurance of having it as a back-up. Highly recommend this for features and the price, which was reasonable as far as these detectors go.
3 people found this helpful
Report
Reviewed in the United States on June 4, 2024
Size: 1-PackPattern Name: AlarmVerified Purchase
I bought two of these to replace some older CO detectors which were nearing the end of their lives. I haven't tested these units for accuracy but I have no reason to believe they will not work. Installation was simple. Just put the batteries in and plug in to the wall. I gave 4 stars instead of 5 because I don't like that the "everything is ok" status is a solid red light. Red light = bad! in our society. It would be much more comforting to look at these units and see a solid green light when all is well, especially when that's how my smoke detector works. When you're getting these set up, I'd recommend first noting the dates of manufacture printed on the back to get an idea of when they're going to need to be replaced. Both units I bought were less than a year old. Also, test that battery that comes with the unit to make sure it's good. Test the unit when its unplugged and when its plugged in to make sure it beeps.
16 people found this helpful
Report
Reviewed in the United States on July 31, 2024
Size: 1-PackPattern Name: AlarmVerified Purchase
Nice product and made well. Works great and small not bulky. well worth the price.
Reviewed in the United States on July 14, 2024
Size: 1-PackPattern Name: AlarmVerified Purchase
Pleased with product. I feel great value. Easy setup. Feeling safe and protected.
Reviewed in the United States on July 22, 2024
Size: (Pack of 3)Pattern Name: AlarmVerified Purchase
Easy to set up and very good quality.
Reviewed in the United States on August 3, 2024
Size: 1-PackPattern Name: AlarmVerified Purchase
Our CO detector got knocked out of the electric plug in, and the prongs broke. So I purchased this replacement detector because it had not only the electric constant power, but it also had the backup battery in the event we lost power. Brown-outs are common in the fall months when it gets hot and the grid gets overloaded, but we needed something low and near the garage that's reliable without power. This little gem was perfect. I knew it was the right detector because it included the 9 volt battery, and the thing worked immediately on plugging it into the wall. My family is much safer now.

Top reviews from other countries

Mine
1.0 out of 5 stars Disappointed :( :( :(
Reviewed in Canada on March 8, 2019
Size: 1-PackPattern Name: AlarmVerified Purchase
I am super disappointed. the machine does not work. and I can not make it work. I am disappointed :( :( :(