First Alert 9120B 120V Hardwired Smoke Alarm (5 Pack)
A 120-volt hardwired smoke alarm with a 9-volt battery backup and tamper-resistant features. Easy to install with a single button test/silence and a loud 85dB alarm; includes batteries for immediate use
Highlights
- 120-volt AC with battery backup
- tamper-resistant design
- easy installation
Pros
- 120-volt with battery backup
- Tamper-resistant locking pins
- Single button silence/test
- Loud 85dB alarm
- Includes batteries
Cons
- Some users note exact fit with older detectors
- Limited details on wiring compatibility
Best For
Features
- 120-volt AC powered with 9-volt battery backup included
- Tamper-resistant locking pins for installer and user security
- Single button for silence and test with an 85 dB alarm
- Hardwired with battery back-up maintains function during power outages
