First Alert BRK SC9120B-12 Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, 12-Pack

Keep your family safe with this 12 pack of hardwired smoke and carbon monoxide alarms; the battery backup means constant monitoring, even if there's a power failure
Features an electrochemical Carbon Monoxide sensing technology as well as an ionization sensor that detects the fine particles of a fast burning fire
Indicator lights on the face of the unit display the presence of smoke or carbon monoxide, while an 85 decibel siren provides a clear, loud warning upon detection
Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when a threat is detected
Simple to use, with a single test/silence button, and side load battery compartment; tamper resistant locking brackets and universal mounting brackets make installation easy
Rigorously tested to meet UL standards
Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety

Style:Hardwired Alarm | Pattern Name:Alarm