First Alert® SC9120B Smoke/Carbon Monoxide Alarm w/Battery Backup, 120V FREE SHIPPING Dry time: 24 hours

Dry time: 24 hours

Efficient operation & proper lubrication of all parts in the system

fruit rots

Applies easily: Use brush

water features

First Alert® SC9120B Smoke/Carbon Monoxide Alarm w/Battery Backup, 120V FREE SHIPPING Dry time: 24 hoursThe First Alert Hardwire Combination Smoke Carbon Monoxide Alarm wires directly into your home's electrical system. In the event of a power outage, this alarm has been equipped with a 9V battery backup to provide optimal protection. The realization of ionization technology combined with an electrochemical sensor ensure optimal safety. A Mute Button has been included to serve the dual purpose of silencing nuisance alarms brought on by cooking smoke and