Experience the next level of fire safety with the Kidde Smoke Detector, AA Battery Powered, LED Warning Light Indicators, model 20SDR. This smoke detector has enhanced sensing technology that reduces false alarms often caused by cooking and sends fast alerts that help give your family more time to get out safely. This alarm offers a modern 5-inch design ideal for all living spaces such as living rooms, hallways, kitchens, & bedrooms. Comprehensively tested and designed to the latest UL standard for safety and reliability, the 5-inch smoke alarm is powered by 2 replaceable AA alkaline batteries (included) for continual detection even during outages. Batteries should be replaced every 6 months or when the alarm sounds a low battery chirp. In addition, it’s self-testing and easy to install with the included twist-and-click mounting bracket. This Kidde smoke alarm is equipped with end-of-life notifications that will beep to remind you it’s time to replace it at the of its 10-year lifespan. Meets requirements of 9th Edition UL 217 and FCC. Does not meet requirements for CSFM.