Kidde Worry-Free Kitchen Sealed Lithium Battery Power Smoke/CO Alarm  P3010K-CO - 21010170 Ideal for the kitchen with 10-year sealed lithium battery and smoke and CO sensing technologies work together to detect real fires faster and reduce cooking-related nuisance alarms Hassle-free protection - Goodbye late night low battery chirps! Never replace a battery during the alarms operating life and no need to worry about the batteries being removed Always on - Sealed-in lithium battery powers alarm for 10 years - the life of the alarm. The right alarm, the right location. - Each of the four smoke alarms includes features designed to address location-specific safety needs, such as an LED light in the hallway. Combination Smoke and Carbon Monoxide Alarm  Smoke and CO sensing technologies work together to detect real fires faster and reduce cooking-related nuisance alarms.