First Alert CO400 Carbon Monoxide Detector, Battery Operated, 6-Pack, White

Protect every level with a reliable 6-pack

The First Alert CO400 Carbon Monoxide Detector 6-Pack delivers a simple, battery-powered safeguard for any home. No electrical work is required—just insert the included 9-volt battery into each unit and they’re ready to help you stay aware of CO conditions across your space.

These detectors use an advanced electrochemical sensor to monitor carbon monoxide levels and trigger a loud alarm when levels rise. CO can originate from a variety of sources such as faulty fuel-burning appliances, blocked chimneys, or nearby generators. Having detectors on multiple levels helps you notice potential threats sooner and respond appropriately.

Easy to use and stay informed

Each detector features a single button that silences or tests the unit and includes an end-of-life timer to indicate replacement time. The setup is straightforward, with maintenance designed to be light-touch for busy households.

• Battery-powered operation keeps monitoring active during power outages
• Advanced electrochemical CO sensor provides accurate readings regardless of placement
• 85 decibel alarm delivers a clear, attention-grabbing warning
• Place one on each level and in every bedroom for comprehensive coverage

In daily life, these detectors offer practical advantages like quick setup, easy mobility between rooms, and a 6-pack option that simplifies safety for rentals or larger homes. They’re designed to blend into typical home interiors while providing reliable alerts when CO is detected.

• Included battery ensures you’re ready right out of the box
• End-of-life timer helps you know when to replace the device

Whether upgrading an older residence or equipping a new space, the CO400 6-pack offers scalable protection with minimal setup. While it cannot guarantee results, it helps you stay informed about potential CO conditions and take timely action.