The First Alert SM210 10-Year Sealed Battery Smoke Alarm with Slim Profile Design offers reliable protection with advanced Precision Detection sensing technology, meeting the latest UL 217 8th Edition safety standards. Its convenient 10-year sealed battery eliminates the need for battery replacements and prevents low-battery chirps for the life of the alarm. Designed to blend seamlessly with modern home decor, the slim-profile alarm is half the depth of a standard unit while maintaining superior functionality. Featuring an easy-to-use test/silence button, it ensures simple maintenance and allows users to quickly verify its operation. The end-of-life warning signals when it's time for a replacement, promoting continued safety. Built to differentiate between common cooking smoke and actual fire emergencies, the First Alert SM210 also detects smoke from synthetic materials, providing fewer false alarms and faster alerts. Upgrade to this sleek, dependable smoke alarm for long-lasting peace of mind.