Look for Interconnected Detectors When Available You can interconnect some smoke and carbon monoxide detectors so that all units in the house sound an alarm when any single one is triggered.

At the moment, our favorite pick — but by no means perfect — is the X-Sense Smart Smoke/Carbon Monoxide Detector Combo, which gets you a pack of five interconnected alarms for around $200 ...

For homes with interconnected smoke alarms, the First Alert Interconnect 2-in-1 Smoke and CO Alarm is a hardwired option that syncs with other compatible alarms.

Each of these interconnected X-Sense alarms in this 6-pack system can be controlled via a remote so users don't have to scale ladders and step onto chairs in order to mute an alarm.

Many smoke alarm systems are interconnected, which means you can thankfully test them all by only testing one unit. I suggest taking a look at your manual or app for instructions on how to test ...