X-Sense 10-Year Battery Wireless Interconnected Smoke Detector Fire Alarm with Over 820 ft Transmission Range, SD19-W, 3-Pack

No problems linking and installing these six smoke detectors, replacing six very old firex detectors, both battery-only and battery-wired units. I've been frustrated for years late in the evening or middle-nighttime with one detector chirping because of a low 9-volt battery. Hopefully, these will indeed last 10 years (but even five years will be satisfactory). Linking one at a time is simple: Out of the box on a convenient table, with units mounted to their bases to be activated, press the button 4 times on one unit, then after it starts flashing (searching), press the button twice on another unit. Repeat for all units. Finally, test the links by holding down the button on any one unit continuously until not only does it start to alarm, but longer until others begin to alarm as well. All linked units begin to sound-off. Mounting was simple to the existing firex base mounts. For battery-only units, the X-sense holes were compatible. For battery-wired units, the firex bases serve as a convenient template for drilling holes in the X-sense bases that match the existing wiring box screws. I never had to open the screws/mollys provided by X-sense. Four units are upstairs, and two units are downstairs, separated by only about 30 feet straightline distance and through at least four drywall/flooring/carpet barriers. Mine was simple, close-distance linking without complications of extensive metal appliances or HVAC ducting. No problems here at all!

I recently installed these interconnected smoke detectors and I’m extremely satisfied. The 10-year battery life is incredibly convenient, eliminating the need for frequent replacements. They work flawlessly, and when one alarm goes off, all the connected units sound, providing extra safety for the entire home. Installation was straightforward, and the build quality feels solid and reliable. Overall, a high-quality, trustworthy smoke detection system that I would definitely recommend.

These smoke detectors work perfectly! Just as advertised. After setup of all 6, I tested them one at a time with real smoke and they all alarm together. I followed the simple setup instructions and was done setting them up in 5 minutes. The trick is to plug all the detectors into their bases on a table, and do the setup procedure. Putting the base onto the detector activates a switch on the back of the detector to "turn it on". They won't do anything until the bases are put on. After setting them up, then install them throughout the house.

They work great. I bought 1 six pack and two 3 packs. Although, one of the units in the 6 pack has something clunking (loose) in it. So 8m not using that one.

We have three cabins that are at least 150 feet from each other. When I pressed the test button on one, all three went off. I can’t vouch for the battery life or ability to detect smoke, but they do seem to have solid range.