3 Pack Photoelectric Smoke and Carbon Monoxide Detector, Smoke Alarm Sealed-in 10 Year Lithium Battery-Operated (White)

Combo Smoke and Co Detector: Features electrochemical Carbon Monoxide sensing technology and photoelectric smoke sensor optimized to detect larger smoke particles produced by smoldering fires; helps minimize the number of false alarms
10 Year Battery Operated: This combination smoke detector and carbon monoxide detector alarm provides 10 years of continuous power with a built-in lithium battery; provides continuous monitoring of smoke and co levels, even if there’s a power failure; an end-of-life signal will let you know when it’s time to replace the unit for safety ”
Test/Sience Button: Tests the unit for proper operation and resets the carbon monoxide alarm, Alarm “