Fire Sentry Battery Operated 4" Smoke Alarm
This Fire Sentry Battery-Operated 4" Smoke Alarm is easy to install and utilizes ionization-sensing technology. The alarm uses one 9 Volt battery (included) that provides continuous coverage even during a power outage. There is a test button to test electronic circuitry, horn and battery function. This smoke alarm has a low-battery indicator and is UL Listed. 3-year warranty.