The Kidde Smart Smoke Alarm with Ring ($54.97) and the Kidde Smart Smoke and CO Alarm with Ring ($74.97) are hardwired alarms with battery backup and will launch this April at The Home Depot.

We hard-wired a First Alert 9120 alarm next to the OneLink by First Alert Wi-Fi Smoke and CO Alarm, with enough distance apart that we could direct smoke at one or the other without blowing it on ...

Feb 8, 2019 3:00 am PST Image: First Alert At a Glance Expert's Rating Pros Interconnects with other First Alert Onelink smoke/CO detectors, so that if one goes off, they all go off Loud local siren ...