First Alert BRK 3120B Hardwired Photoelectric and Ionization Smoke Alarm with Battery Backup Dual Sensing Smoke Alarm 1-Pack
- Hardwired alarm includes battery backup for power outages.
- Photoelectric and ionization sensors provide comprehensive fire detection.
- A single button makes alarm easy to test monthly or silence during a false alarm. Temperature Range: 40°F (4°C) to 100°F (38°C).
- Two latching features help indicate a low battery or the originating alarm in a system.
- Optipath 360 patented technology provides 360 degrees of access to the smoke alarm. Emits T3 Pattern.