First Alert Carbon Monoxide Detector Alarm | Plug-In with Battery Backup, CO605

utterly useless, sold on amazon as a plug in alarm suitable for U.K market, plug in not compatible with british wall sockets. needs returning to the U.S.A.

The Bottom Line: This is a highly flexible carbon monoxide detector that solves the "blocked outlet" problem with its detachable cord, while providing a clear digital interface that makes monitoring straightforward. Installation & Setup: The "Dual-Power" claim isn’t just marketing; it makes installation incredibly versatile. You can plug it directly into a standard 120V outlet like a typical sensor, but the standout feature is the detachable plug. Using the included 6-foot power cord, I was able to mount the detector at eye level on the wall while plugging it into a lower outlet behind furniture. This is a huge win for accessibility and better airflow monitoring. Visibility & Interface: The backlit digital display is a major upgrade over standard "LED-only" models. It’s easy to read even in low light, displaying current CO levels and battery status at a glance. I particularly appreciate the "Peak Level" memory feature, which lets you see if any levels were detected while you were out. Safety & Reliability: Battery Backup: It uses 2 AA batteries (included), ensuring it keeps monitoring during power outages. Loud Alarm: The 85-decibel horn is piercing enough to wake you from a deep sleep or hear from another floor. Maintenance: The front-access battery door means I don't have to unplug or unmount the unit just to swap batteries. Pros: Detachable plug allows for wall mounting or direct plug-in. Clear, backlit digital display replaces confusing beep codes. Continuous monitoring with a reliable electrochemical sensor. Cons: The display does not stay lit constantly to save power, so you have to press a button to see it clearly in pitch black. Final Verdict: If you want a reliable CO detector that doesn't dictate exactly where it must be placed based on your outlet height, the First Alert CO615 is the best option in this price range.

It arrived ahead of estimated arrival. It was well packaged and protected. This item comes very highly rated and hasn't disappointed yet.eg false alarms; dead batteries. Peace of mind at a fair price.

Just as expected

I've had this for several years now and still working well.