The First Alert Battery Photoelectric Smoke and Carbon Monoxide Alarm detects both smoke and carbon monoxide. It is a wireless-enabled battery-operated detector that features an 85-decibel siren plus a voice alarm to let you know where the danger is. This technology allows other compatible First Alert wireless enabled alarms located in several areas of your home to communicate with each other, alerting you to a problem early even when it’s on another floor. The smoke and carbon monoxide detector feature a photoelectric smoke sensor and an electrochemical carbon monoxide sensor.
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