First Alert Hardwire Dual Photoelectric and Ionization Sensor Smoke Alarm with Battery Backup – Link
Amazon has this marked down right now to just $19.97.
This was selling for $28.20 and is now at its lowest ever.
- Dual Photoelectric and Ionization sensing technologies for optimal sensing of smoke particles produced in both flaming and smoldering fires
- Two Latching Features
- Optipath 360 Technology
- Single button silence/test, and loud 85dB alarm
- 2 AA Batteries Included; 10 Year Limited Warranty