- Photoelectric smoke alarms are generally more effective at detecting, slow, smoldering fires--fires which smolder for hours before bursting into flame
- A super heavy-duty 9-Volt battery is included and can operate for up to 3-Year from the date of original installation
- Mounting hardware is included and the installation bracket is designed to give you a fast and easy installation
- The alarm sounds with its loud 85 decibel horn and the red LED indicator flashes
- Audible low battery indicator; alarm and power test buttons
