First Alert 9120B hardwired smoke detector (3-pack)
Three-pack hardwired smoke alarms with battery backup for constant monitoring. Ionization sensor detects fast-flaming fires and alerts with 85 dB; great for placing on every level and bedroom. Customers note easy installation and reliable function
Highlights
- 3-pack with battery backup
- 85 dB audible alert
- Interconnectable with other detectors
Pros
- 3-pack set for multi-room coverage
- Battery backup for power outages
- Easy installation
- Ionization sensor for fast-flaming fires
- Interconnects with compatible BRK/First Alert detectors
Cons
- Mixed feedback on battery pre-installed vs. dead batteries
- Some comments about wiring considerations
- No easy-connectors noted by some customers
Best For
Features
- 3-pack hardwired smoke alarms with battery backup for continuous monitoring
- Ionization sensor detects fast flaming fires and emits an 85 dB alarm
- Can connect to other compatible BRK or First Alert detectors for synchronized alerts
