Kidde Hardwired Smoke & Carbon Monoxide Detector, 10-Year Battery Backup, Voice Alerts, Interconnectable LED Warning Light Indicators

Easy replacement for peace of mind.
Bought 4 to replace 10 year old Kidde Smoke detectors in our cabin. I’d read the reviews and also purchased the optional wire adaptors figuring I’d rather have them than wish I did. The detectors fit the existing mounting rings and the adaptor slid right on both the new unit and into the cabin wiring. This let me hook up the new detectors quickly and without a single cuss word! Each unit was tested, gave the requisite alarm and voice warnings, and now are doing their job without a chirp or false alert. Well worth the extra $$ to have the built-in10 year battery so we won’t have to replace batteries in a few years. I checked the manufacture date to be sure these were new units and marked each new detector with the date of installation. We’ll see if the 10 year promise is true but so far, so good!

Very disappointed-Update!
**The Kidde support was excellent! Within 10 minutes on the phone they determined the issue and are shipping a replacement.***Note: if you have this problem, call them when it’s occurring to troubleshoot.Initial review:Worked great for 6 months then began going off with error messages. It would beep three times then say “smoke detector error” . We’d spray the vents with compressed air, reset it and it would be okay for awhile. Then it began going off everyday. Sometimes multiple times.We had to disarm it to stop it saying “smoke detector error”.I’m very disappointed with this product. I had my last two for 10 years with no problems until the built-in battery died. Just like it’s supposed to work. But this one is a complete failure.Wish me luck with getting a replacement from Kidde.If not, I will find another product that works! So disappointed.

Safety and protection for years
Our current detectors have been chirping at us despite being hard wired. Turns out it was alerting us to the sensor being expired and it being time to replace the entire alarm. These are the newer version of the ones we currently have. We feel a peace of mind having a dual smoke and CO2 detector that is hardwired and has a back up battery that will last the life of the alarm. My husband was able to easily install these himself. KIDDE is a quality, reputable brand that has cost effective products to keep us safe in our home.

Inconsistent, defective, and not worth it.
If a smoke detector false alarms once or twice in 10 years, maybe because someone was cooking or a neighbor was smoking nearby or something, OK.If a smoke detector—and not a cheap one, but a quite expensive one—false alarms 4 times in two years, in the middle of the night, for no obvious reason, it is a serious problem.I bought 4 of these expensive, Kidde brand detectors because I wanted to spare no expense for my family’s safety. First, we got false alarms (that would then set off all the alarms in the house) because one of the detectors we didn’t replace was too old (Kidde support told me they had to be made within the last 10 years or so.) Why different models would cause false alarms in newer models (all our units are hardwired) was beyond me, but OK. So I bought a newer model to replace the old one.More false alarms, even though all the models were Kidde and from 2025, but they weren’t all IDENTICAL models, so OK, I’ll replace the ones that don’t match with the exact same model.Fast forward to tonight at 2:40 AM, when all the models start going off at once. A fire, obviously, so my wife and baby and I leap out of bed and I go frantically trying to find the source of the fire. Guess what? No fire!But after they all eventually shut off (which took about 2 interminable minutes), I noticed the unit in my bedroom didn’t have the green LED lit anymore. So the unit is dead after only a few months? Maybe that’s why the alarms all went off—after all, if one unit dies, it makes sense they should alert you to a fire!The only burning that has ever happened in my house has been the hole in my wallet from buying these terribly expensive and consistently defective smoke detectors.And for the record, my house was built in 2014. Maybe it’s a wiring issue in my house, but it sure doesn’t seem like it to me. In any case, I will be looking for another brand and will be contacting Kidde customer support because I am at my wit’s end.