First Alert Hardwired Combination Smoke and Carbon Monoxide Alarm With Battery Backup

The First Alert Hardwired Combination Smoke and Carbon Monoxide Alarm with Battery Backup offers reliable smoke and carbon monoxide detection in one convenient unit. Featuring a photoelectric smoke sensor and an electrochemical CO sensor, it effectively identifies smoke from smoldering fires and carbon monoxide leaks from various sources. In the event of a threat, the alarm emits a spread spectrum horn tone designed to be easily heard by individuals with age-related hearing loss, ensuring safety for everyone in your home.