First Alert Carbon Monoxide Alarm with Battery Backup, 3-pack, Model CO400A

First Alert Carbon Monoxide Alarm with Battery Backup, 3-pack, Model CO400A   Features: Test and silence button Loud 85dB alarm Low battery warning 9-Volt battery included 5-Year warranty   Product details have been supplied by the Manufacturer Product Description First Alert CO400 Carbon Monoxide Alarm The First Alert CO400 Carbon Monoxide Alarm is designed to detect carbon monoxide. This wireless carbon monoxide detector is ideal for spaces without electricity or those that lose power frequently. The personal carbon monoxide detector features a loud 85-decibel siren, indicator lights that warn when batteries are low, and an end-of-life timer that lets you know when it is time to replace the device. What's in the Box: • First Alert CO400 Carbon Monoxide Alarm • 9-volt battery • Owner's manual At a Glance: • CO detector alerts you to carbon monoxide • Features an advanced electrochemical CO sensor • Loud 85-decibel alarm sounds when CO levels are elevated • Battery