The Worry-Free Kitchen Smoke Alarm is powered by sealed, long-life lithium batteries that last for ten years (the life of the alarm), meaning the alarm is always on. This alarm is ideal for the kitchen. The Kitchen Alarm is a combination smoke and carbon monoxide alarm. It features a unique sensor algorithm that detects real fires faster and reduces nuisance alarms. With a sealed, long-life lithium battery smoke and carbon monoxide combination alarm installed in your kitchen, you can enjoy peace of mind knowing your kitchen smoke alarm is always on; 24 hours per day, seven days a week for a decade.