Last Updated: January 13, 2022 (Refresh Now)
FIRST ALERT Carbon Monoxide Detector No Outlet Required Battery Operated 2 Pack CO400
Last Updated: January 13, 2022 (Refresh Now)
7.9
SCORE
/10
Total Reviews
999
Old Reviews
509
Unverified
56
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Review Analysis - 434 recent, verified reviews
Detailed Mode
Usage
118install, easy, instructions, easy to use, house
+89%
-11%
" ... Detectors Very simple to install just follow directions 5’ off floor outside bedrooms in hallways. ... On ceiling in basement a few feet from the furnace. ... "
" ... Easy to install. ... "
" ... Item as stated easy install. ... "
" ... different (an annoying, additional step for installation) ... "
" ... Perfect to protect my family ... Put one on every level of our house ... "
" ... Works well for traveling ... "
" ... Super easy to install! ... Instructions were clear and I was able to get it attached to my wall quickly. ... "
" ... Easy to use. ... "
Reliability
54died, detectors, detector, 5 years, model
+46%
-54%
" ... For some reason I have been through several of these detectors and within 6 months they always start beeping and the trouble code is always that the element is no good. ... "
" ... The item is defective and there is no real reason to return it while there is no value in it regardless. ... "
" ... Of course, I did not check this device, since it was brand new, so I wasted alot of time. ... "
" ... This product stop working after 4 months. ... "
" ... It expired Oct 2012. ... "
" ... These are absolute junk. ... They barely lasted 1 year. ... "
" ... Bought this on Amazon September of 2016, and it just died September of 2020. ... "
" ... It went to chirping about 6 months, or more. ... So this product lasted around 8 months. ... Im buying another one because it's cheap and just need it to work 1 or 2 months. ... "
Battery
50batteries, 9v, aa batteries, beeping, 9 volt battery
+38%
-62%
" ... The worst part is the battery compartment is a pain to get open with the cheap plastic being used. ... "
" ... The battery cover doesn’t fit, therefore the battery is not secured and moves around. ... "
" ... It requires a pair of pliers to open the battery box. ... "
" ... The battery door is quite difficult to open, and uses a 9V battery (despite the Amazon description stating 2 AA). ... "
" ... The quality control on the one was so poor that the little tab that is suppose to prevent it from being installed without a battery was malformed. ... these use a 9v not double a, so that is not a big deal except if you change batteries every 6 months. ... "
" ... It's listing said two AA batteries. ... Not so as this new unit took a 9 volt battery. ... "
" ... 30 seconds later is beeping and I had to pull the battery out. ... "
" ... The information that 2 AA batteries are needed is incorrect - the sensor works with a 9 volt battery. ... "
Marketplace
42return, replacement, model, returning, replaced
+43%
-57%
" ... I want to return items. ... "
" ... This must be a glitch in their system since its from amazon. ... "
" ... Just realized that the detectors we purchased off of Amazon Feb 2020 were manufactured in Aug 2018. ... "
" ... The item is defective and there is no real reason to return it while there is no value in it regardless. ... "
" ... i got an open but taped back together box. ... "
" ... I ordered this in October, 2019. ... "
" ... I’m returning it and trying again. ... "
" ... But the replacement also didn't work. ... "
Size
33screws, screw holes, holes, spacing, new one
+64%
-36%
" ... Works well for traveling ... "
" ... It was easy to put together but I saw the wall mount design changed and the previous nails placements no longer fit . ... "
" ... Nice size small compact on the wall ... "
" ... Although the unit appears identical to the previous one, the screw placement to hang it was slightly ... "
" ... Bought it for traveling. ... "
" ... If purchasing a replacement for your older C0400, note the screw placement may wider than the old one. ... I hope the old mounting position in my camp trailer will have a wide enough support backing to accommodate a wider screw position. ... "
" ... We installed this on our Searay Sundancer with self adhesive tape. ... "
" ... For example, how about a mounting plate with a couple of magnets attached to hold the unit in place? ... "
Body
30open, battery, plastic, compartment, broke
+50%
-50%
" ... Instead, the plastic bends way more than it should. ... I figured this out by prying up the plastic and finding the poor alignment, then bending it back the “wrong” way (away from the board) and inserting a small screwdriver and activating the switch that way. ... "
" ... So when you go to change the pre-installed 9v battery, there is a plastic tab on the rear of the door preventing the door to close with a 9v battery installed. ... "
" ... I will not risk my families life with such a flimsy product. ... "
" ... It is only held on by a plastic tab. ... Mine broke on first use. ... "
" ... It broke off . ... "
" ... First Alert has changed the design and the door to access the battery compartment is extremely difficult to both open and close. ... "
" ... Had to use a screwdriver to get it to budge, no slide in this door. ... "
" ... The old version had a battery door that swung open easily from the front. ... "
Price
22product, money, worth, safety, reasonable
+95%
-5%
" ... Great product at a great price. ... "
" ... All at an affordable price. ... "
" ... Good value for the money. ... "
" ... Good value and same as others selling it at much higher price ... "
" ... Very good, good price ... "
" ... Overall, money well spent. ... "
" ... Worth the safety for the low cost ... "
" ... Item was as described, reasonable price ... "
Marketplace / Returns
18replacement, model, returning, replaced, replace
+17%
-83%
" ... I’m returning it and trying again. ... "
" ... The item is defective and there is no real reason to return it while there is no value in it regardless. ... "
" ... I sent it back. ... "
" ... But the replacement also didn't work. ... "
" ... My return date has pasted, July 3, so I'm stuck with them unless Amazon contacts me. ... "
" ... However the window to return this item was closed on Amazon, so I cannot return it at this time. ... "
" ... Bought this on Amazon September of 2016, and it just died September of 2020. ... "
" ... Then shelter in place came along and I am over 65 y/o and the date on returning has ran out. ... "
Marketplace / Marketplace
18ordered, 2020, product, picture, feb
+50%
-50%
" ... Very disappointed with Amazon on this purchase. ... "
" ... Died less than one year after purchase on Amazon. ... Sold as new, purchased in Feb 2020, yet when received it had a date of Nov 2013. ... "
" ... This must be a glitch in their system since its from amazon. ... "
" ... Bought this on Amazon September of 2016, and it just died September of 2020. ... "
" ... Just realized that the detectors we purchased off of Amazon Feb 2020 were manufactured in Aug 2018. ... "
" ... Firstly the unit I received was not the same as the product picture. ... "
" ... I called the mfg. ... They said call Amazon. ... "
" ... I ordered this in October, 2019. ... "
Clock
17co, co400, carbon monoxide alarm, test the alarm, test button
+47%
-53%
" ... I recently replaced my CO400 carbon monoxide alarm. ... "
" ... So it would not fit where I had mounted the previous alarm. ... "
" ... Enormous flaw: I can’t test the alarm or silence it. ... "
" ... 9 Volt battery put into the alarm, and it isn't powered on. ... "
" ... The detector started to emit five chirps per minutes which indicates end of life and to replace the alarm. ... "
" ... Alarm was expired and therefore useless. ... "
" ... Alarm doesn’t sound. ... "
" ... These alarms were dated August 2018 . ... "
Stand
16mounting, screws, screw, holes, spacing
+56%
-44%
" ... Nice size small compact on the wall ... "
" ... The mounting hole spacing was different than the old unit, even ... "
" ... Measuring the distance between the screw holes is simple enough, but many products that require screwing into wall board will include a templet. ... "
" ... We have no idea why they changed the mounting screw positions from the older model. ... We now have two extra holes in our wall which will need to be repaired when we paint. ... "
" ... It was easy to put together but I saw the wall mount design changed and the previous nails placements no longer fit . ... more holes on my wall! ... "
" ... Then all we, customers have to do is to mount them . ... and then mount!!!!! ... "
" ... I mounted them about half way up the wall since the other are on the ceiling. ... "
" ... Now why in the world would they change width of screw mounting? ... "
Marketplace / Delivery
9delivered, received, yesterday, unit, manufacture
+78%
-22%
" ... I purchased this on Amazon and it was delivered in two days and with a better price than Ace Hdwre. ... "
" ... Arrived as described and on time. ... "
" ... Amazon was good to its word and had it delivered in record time. ... "
" ... The price sold me, and it was delivered the next day. ... "
" ... Great product for price and shipment was fast. ... "
" ... they arrived on time . ... "
Comfort
6one, dizziness, beep, sound, hope
+50%
-50%
" ... Constantly falling off. ... "
" ... It broke off . ... "
" ... No skin off my back. ... "
Accuracy
6way, one, device, assume, accuracy
+83%
-17%
" ... Very accurate device and a great price. ... "
" ... Accuracy - one Starr - I do not know how to test accuracy. ... I hope it is accurate. ... "
" ... So, I can only assume that it is accurate. ... "
" ... No way to determine how accurate it is. ... "
" ... I assume it's accurate but there's really no way to check. ... "
Software
5screw driver, fire, cracked, use, ups
+20%
-80%
" ... I had to use a screw driver to pry it open and then discovered a secondary lock which then makes it difficult to open and then close. ... "
" ... useless fire insurance requirement. ... "
" ... - Only tools you will need is a leveler, Drill, Screw driver, and a hammer. ... "
" ... I got a return by UPS from Amazon but could not find a bar code from Amazon to give to UPS. ... "
Performance
5fast
+100%
" ... seems to be doing its job ... "
" ... Hopefully it will do the job ... "
" ... Does the job ... "
" ... great item fast transaction ... "
Design
5one, looks, instructions, design, unit
+60%
-40%
" ... My old unit went bad this one looks great ... "
" ... - Feels well built ... "
" ... Hope it never goes off, but feel better knowing it's on. ... "
Sound
4sound, enough, alert, wake, still
+75%
-25%
" ... It detects well without false alarms and is loud enough to hear from the other end of the home. ... "
" ... loud and stylish ... "
" ... From past knowledge these First Alert CO detectors make a distinct sound when they are at the end of their life. ... "
Marketplace / Product As Described
3picture, described, works, received, item
+67%
-33%
" ... Came as described ... "
" ... Product is as described. ... "
Connectivity
3monitor, give, devices, connected
+100%
" ... I loved the product, I just needed the plug in version. ... "
" ... We are connected townhomes. ... "
" ... Works great with tablet. ... "
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Specifications
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