Kidde Worry-Free 10 Year Battery Combination Smoke and CO Alarm with Voice (2-Pa

10-year sealed Lithium-ion battery, combination smoke and carbon monoxide alarm with voice warning that features photoelectric and electrochemical sensing technology with Smart Hush feature. This combination alarm combines the detection capabilities of a photoelectric sensor with that of an electrochemical sensor, used to detect CO. When either sensor notices a potential hazard, it will communicate with the other reducing nuisance alarms increasing the detection of actual threats. Combination smoke and carbon monoxide alarm smoke and CO sensing technologies work together to detect real fires faster and reduce cooking-related nuisance alarms Sealed-in lithium battery sealed-in lithium power supply; no battery replacement required over the 10 year life of the alarm, eliminates worry about battery removal or unauthorized deactivation of alarm 2 pack bundle Smart hush temporarily silences nuisance alarms for approximately 10 minutes and will not allow hush mode unless the unit is in alarm mode End of life hush end of life indication can be silenced 3 days at a time up to 30 days to allow for alarm replacement at a more convenient time

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