Kidde P3010K-CO Worry-Free Kitchen 10-Year Sealed Lithium Battery Operated Smoke & CO Alarm 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. UL Listed 85 decibel alarm Only smoke alarm line with a photoelectric smoke sensor programmed to reduce nuisance alarms Sealed-in lithium battery prevents tampering or removal; operates 24/7 for a decade Hush button temporarily silences nuisance and false alarms Test-Reset Button tests the alarm circuitry and horn. Resets memory after alarm has soundedEnd-of-life signal chirps every 30-45 seconds when alarm needs replaced Deactivation switch disables the alarm and makes the batteries safe for disposal once the unit has reached the end of its 10-year lifeTamper resistant feature prohibits a disabled alarm from being placed back onto the mounting bracket10-Year Limited Warranty 11.00 L. 7.00 W. 1.50 H.