The concept is simple: A smoke alarm that tells you there’s a fire nearby is a great, but a smoke alarm that tells you there’s a fire no matter where you are is even better. Smart smoke and carbon monoxide (CO) detectors are one of the most useful categories of smart home gear on the market, mainly because they offer a clear advantage over “dumb” versions of the same product. And if you have a second home or travel frequently, the additional peace of mind they can provide is invaluable.
Updated April 5, 2021 to add our X-Sense XS01-WT Wi-Fi smoke alarm review. While this model doesn’t offer interconnected features that would enable it to sound off when smoke is detected by a matching device installed in any other room of your home, you could install one of these in each occupied room in your home to get the same type of coverage.