First Alert 9120B Smoke Detector, Hardwired Alarm with Battery Backup, 6-Pack
4.7
(16k+ ratings)
This 6-pack of hardwired smoke alarms features a 9-volt battery backup for continuous protection during power outages. Each alarm is equipped with an ionization sensor to detect fast flaming fires and emits a loud 85-decibel alarm. A single button allows for silencing nuisance alarms and testing functions, while indicator lights show smoke detection. The alarms can be interconnected with compatible devices, ensuring all alarms sound when one detects smoke. Additional features include a latching alarm indicator, end-of-life signal, and easy installation with tamper-resistant brackets.
What customers like:
- Easy to install
- Comes with battery backup
- Good value for money especially in contractor packs
- Matches existing electrical connectors for easy replacement
- Includes all necessary installation components
- Aesthetically pleasing design
- Long life cycle of 7 to 10 years
What customers dislike:
- Batteries installed may need immediate replacement
- One instance of a battery dying prematurely
- No advanced features beyond basic functionality
