First Alert BRK SC9120B Hardwired Smoke and Carbon Monoxide Detector with Battery Backup
Description
- This First Alert SC9120B hardwired smoke and carbon monoxide detector includes a 9-volt battery backup that continues to protect you in the event of a power failure.
- 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
