FIRST ALERTBRK SC7010B-6 Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, 6-Pack,White

Replaced 4 smoke detectors from 98/99. It's nice to step up to a 2 in one product that link together. They require minor wiring, as you should expect. If you don't do anything more than change lightbulbs, you should have someone else install these. As for the accuracy rating, I am basing that solely on the fact that they shut off after testing them. So they are able to detect the lack of smoke or CO2.

The date on product is recent so that's good also fits great.

Pros of First Alert Brand of detectors* Made in Mexico* Maintains a take-back hazardous waste disposal program - for ionization smoke alarms.* comparable pricing to other brandsCons:* Might need to change the hardwire and interconnect pigtails if replacing a different brand of smoke detectorI replaced several FireX/Kiddie smoke & CO alarms with First Alert models SC7010B, SC7010BV, & BRK 3120B. Changing the power and interconnect pigtails isn't hard, but I purchased the First Alert BRK ADF-12 adapter plugs [ASIN: B0039PJK40] to make the process easier for the many alarms that I had. Each alarm took less than 10 minutes to replace. The process was straightforward: Replace the faceplate, connect the adapter plug and connect the First Alert smoke alarm. Easy-peezy! It's been only a short time since they have been installed, but no false alarms yet!Ionization smoke detectors contain a small amount of radioactive material (1 micro curie of Americium 241). The radioactive element should be disposed of at a radioactive waste facility. Some municipalities offer to dispose of the ionization alarms properly, while others to do not.As of Sept 2019, FireX/Kiddie discontinued it's take-back disposal program. The Kiddie website now states: "Typically, alarms may be disposed of in your regular, residential trash. Verify with your local municipality regarding disposal ordinances before disposing of an alarm."This is so egregious! Kidde isn't a responsible manufacturer when it comes to handling their product at end of life. What happens when your local municipality does not have a safe disposal program for the radioactive material in ionization detectors? Kiddie is flaunting that they simply do not care about the environment.That alone is the reason to purchase from First Alert instead of Kiddie - First Alert has continued to maintain its take-back hazardous waste disposal program. Think about the future generation when deciding which smoke detector to purchase!In the end, I'm happy with my purchase knowing I gave my money to First Alert, a company that still cares about the environment!!

Overall, a very good unit, physically not obtrusive or annoying, just hangs on the wall watching for signs of a fire or high CO levels...barely notice it is there, until it goes off, but that's the purpose of its existence :-)Had an ionizing detector in our bedroom, kept going off whenever toast was burned in the kitchen on other side of house, LOL. (Full disclosure, we previously changed out the kitchen's to CO-only unit because smoke detection was not recommended in that zone, and it was a pure nuisance if doing anything beyond reheating something in the microwave...) After visiting the manufacturer's website, we found they recommended a photoelectric detector for bedrooms anyhow. Ordered this model because we have BRK/First Alert hardwired detectors in our house already, so their wiring plug was in place. Mounting base had to be changed, they are keyed by size to specific detector types so once installed, you don't rehang wrong type detector in the wrong area if you take any down for whatever reason...painting walls a different color is a good example of why one might temporarily remove a smoke detector.Really like the new broad spectrum sound for warnings, much easier on ears in general. Designed to not overload hearing aids yet still be detectable for people with hearing impairment. Can't couch for that part, but I can focus on getting safely out of my house when we do fire drills, instead of trying to cover my ears to stop the piercing pain, so it's a win for us :-)Safety advice: smoke detectors have a 10 year working life, and should be replaced accordingly per NFPA and BRK/First Alert's recommendations. With that, the first couple detectors we ordered on Amazon (specifically, from Amazon Warehouse Deals) were apparently rather old stock, having 2 and 3 years remaining before "expiration" and were each returned to Amazon with return comments that the respective unit was nearing end of NFPA's recommended effective life, should not be sold as "like new" when instead were *very old* stock -- 3rd one was a keeper, had a 2019 mfr date -- so word to the wise, check those dates for your own safety!

It is my updated review.My primary message was:"I bought the Detector on November 16, 2021. Today is December 24. 2022.The Detector is dead instantly. How can be a 10-years of limited warrantyfor the item which died after one year of using?..."But.December 25 I connected to the First Alert Support Service.December 27 I received a new Detector via FeDex.I like the First Alert Support Service!Buy First Alert items without any worrying!