I had to replace all of the smoke detectors in my house because they were all just old. All were hard wired except one...way up on the wall in our vaulted living room. I climbed up to replace it and found out it was not hard wired with the rest of them. I bought this to replace that one and it's super easy to mount and replace the battery when needed. I just replaced it so I obviously can't comment on battery life but it's easy to replace so I am not worried about it. Put in a screw or two to hold the base and then simply twist the detector into place and you are done and protected.

Install was easy and worked great.

This is a battery powered dual smoke alarm. It has both photoelectric and Ionization detection so it covers both types of fires. Has a 10 year built in battery. It's not able to wirelessly interconnect with other units. No CO detection either. Installation was painless - turn on unit, attach to ceiling.

This is my second purchase of a First Alert Dual Sensor Smoke and Fire Alarm. I turned to this product after I found that the Kidde smoke detectors installed as part of the real estate transaction on the purchase of my new home were complete duds.I want to take this opportunity to point out that in some states it's no longer possible to buy a conventional battery-operated smoke alarm. I am glad Amazon did not prohibit the shipping to California, where I live, because I am absolutely convinced that our clueless legislators have created a public safety hazard by forcing the sale of smoke detectors to rely on 10-year (non-replaceable) batteries. Because I had "new" smoke detectors installed in my home and because the "Push to Test" feature worked, I could have been clueless for as long as 10 years that they were in fact inoperable units. The only reason I learned otherwise is because I nearly burned down my house using a vintage toaster (my bad) the second week after I moved in. I thought it was a fluke that neither of the Kidde smoke alarms went off since they were located in bedrooms (not the kitchen). But then I had a near miss a few weeks later when the damper (newly installed!) stuck closed on first use of my fireplace. In that instance, the entire house filled up with smoke to the point where I had to open all the windows and doors in the dead of winter and evacuate myself (asthma) and my pets to let the smoke clear. Again, the "new" Kidde smoke detectors with 10-year batteries failed to emit a single chirp. Further testing would reveal that even burning a paper towel with a lighter an inch away would not provoke the Kidde smoke detectors to sound an alarm.The problem with forcing consumers to rely on 10-year safety devices that are built to cheap Chinese standards is that they can be defective for that long and consumers may not be the wiser because the longer they stay in place and the less attention they require — i.e. to change out batteries on daylight savings as is the usual practice with a conventional smoke detector — the more likely it is that consumers will miss the fact that A) their device is defective or B) 10 years has lapsed and the battery is dead.I hope other States do not follow California's lead and that this dual-sensor smoke detector is not discontinued. Thanks to the wake-up call with the Kidde detectors — which relied on a single-sensor design — I performed the same paper-towel test with these First Alert smoke detectors and they passed. At the same time, these are not so sensitive that they produce false alarms.The reason I turned to First Alert was because I contacted Kidde in the hope that they would consider recalling the smoke alarms that did not work in my home. After all, what are the odds that not one but two would be defective? They agreed only to replace my smoke detectors — but they took TWO MONTHS to ship me the replacements, which was an unacceptable length of time to go without a working smoke detector in my home!If anything, my advice to politicians who are considering making laws about safety products of this type is that they mandate a dual-sensor design — but continue to give consumers the choice as to whether or not they prefer to change batteries annually or take their chances with the 10-year variety.Thank you, First Alert.

Had an electrical home inspection, found that I needed to replace old one, but needed four total in my house.KIDDE is a great product & this one is a Consumer Reports pick.Easy to install instructions.

There are 2 great things about this smoke alarm, other than the good price.1. The battery is included. Just pull out the tab that is used to keep the contacts separated and you are all set. This saves at least $1 per alarm.2, I could use the mounts that were already there for First Alert alarms that I had put up 10 and maybe 15 years ago. I didn’t have to use the the new ones. This was a big deal, since my ceilings are very high and while I could get on a ladder to screw the new alarm into the old mount, it would have been hard to put up a new mount. While I hoped that this would be true, I wasn’t sure it would be - I bought this one because the picture on listing looked the same as the ones I had installed, but so often companies “improve” things and make them incompatible with older products. The inside of the alarm may be different, but the mounting is not. Kudos to the company for making it really easy to install so I didn’t procrastinate .

This is a replacement for a brand new Kidde smoke detector that allegedly reduces false alarms. Couldn't be further from the truth. The Kidde was absolutely the worst smoke detector that I've ever experienced. It was a non-stop avalanche of false alarms. I did research and moved it to a different location in the room. I even placed a fan to blow fresh air in it's direction. All to no avail. Then I remembered the smoke detector that I had before the Kidde was trouble free. It was a First Alert that is no longer made. So, out of desperation, I decided to take a gamble on a new first alert. Wow, what a difference! Peace is restored in my bedroom!My final word: A smoke detector that false constantly is DANGEROUS because, at best, it will be ignored. At worst, it will be taken down or otherwise disabled. So effectively a smoke detector that cries 'Wolf!' is the same as having no smoke detector at all!

I like to use a 9 volt battery that I insert myself. I bought a smoke and carbon monoxide detector that had a sealed battery, my wood stove released a bunch of smoke when I opened it. It set off the alarm and when I got it turned off , it could not be reset .

Yes I’m sure the alarm is a good product but I never received it after 1 month , DHL not so good 👎

Received in excellent condition.

Works well, pleased with my purchase.