First Alert 9120B Smoke Detector, Hardwired with Battery Backup
Hardwired smoke detector with battery backup and ionization sensor. Alerts at 85 dB and supports interconnection with compatible units; good replacement for older models, easy to install, per customer feedback
Highlights
- interconnect capability
- battery backup
- ionization sensor
Pros
- ionization sensor
- interconnects with compatible detectors
- easy to install
- battery backup included
- compact design for multiple units
Cons
- loose neutral connection noted as potential issue
- mentions potential device malfunction with wiring
- requires proper wiring on each level
Best For
Features
- Hardwired smoke detector with battery backup and 85 dB alarm
- Equipped with an ionization sensor for smoke detection
- Can connect to other BRK or First Alert smoke detectors to synchronize alerts
- Single test/silence button and side load battery compartment for easy maintenance
- Tamper-resistant locking brackets and universal mounting brackets for installation; UL-tested
