Eton has been making emergency preparedness gear for years, and their 10-Year CO Detector reflects that focus on practical, real-world use. The electrochemical sensor inside detects carbon monoxide from gas appliances, fireplaces, and furnaces. When it hits dangerous levels, the 85-decibel alarm cuts through noise loud enough to wake you from deep sleep. That matters because CO is odorless and colorless—you won’t know it’s there until the alarm tells you.

Installation takes about five seconds. Plug it into any standard wall outlet, and you’re done. The real trick is the battery backup: a 10-year built-in cell plus two Energizer AAs keep it running during power outages. The digital display shows current CO levels in real time, so you can see if a reading is creeping up before it becomes an emergency. There’s also a built-in flashlight on the front, which is handy for navigating a dark hallway during an alarm.

The trade-off is that it’s a plug-in unit, so placement is limited to where you have outlets. You won’t mount this on a wall near the ceiling like a smoke detector. But for a bedroom or hallway where you can reach a socket, it offers straightforward, long-term protection without any wiring or monthly battery swaps.