First Alert has been the default choice for home alarms for decades, and the SMICO100-AC updates that legacy with Precision Detection technology. It’s a hardwired 2-in-1 smoke and carbon monoxide unit that also includes a battery backup. The real differentiator here is the interconnect capability: you can wire multiple units together so that when one alarm trips, every alarm in the house goes off. That matters because a fire starting in the basement won’t wake you up if the only alarm is in the hallway.

The Precision Detection system is designed to reduce nuisance alarms from cooking steam or shower humidity while still catching real threats quickly. In daily use, that means fewer false alarms at 2 AM from a burnt piece of toast. The unit is corded electric with a battery backup, so it keeps working during a power outage. Installation is straightforward if you have existing wiring, and the 2-in-1 design saves you from mounting separate detectors for smoke and CO.

One honest limitation: the interconnect feature requires compatible hardwiring between units, so it’s best suited for new builds or homes with existing wired alarm systems. If you’re renting or don’t have the wiring in place, you’ll need an electrician. But for a permanent setup, this is a reliable, no-nonsense upgrade that meets current industry standards without unnecessary smart home gimmicks.