Kidde I9010 Battery Operated Smoke Alarm, 4-Pack Ten-Year Life Smoke Alarm

Kidde Battery Operated Smoke Alarm, 4-pack Features: Sealed in Lithium Battery Operated, Never Replace the Battery Over the Ten-Year Life of the Alarm. Powered by a Tamper-Free Sealed Lithium Power Supply. Self-Activation Automatically Activates Unit When Attached to Mounting Bracket. Smart Hush Silences Alarm in Non-Emergencies. Product Details   The Kidde i9010 is a 10-year worry-free smoke alarm. It features a sealed-in lithium battery with a lifespan of 10 years. This means that battery replacement is unnecessary; simply replace the whole unit at the end of its 10 year lifespan. When this battery is at the end of its life, it will chirp every 40-45 seconds to indicate that a new alarm needs to be installed. Because this Kidde smoke alarm runs off of a tamper-proof battery, it features a very simple installation. Simply attach the mounting bracket where desired and then connect the alarm, which will then automatically activate the battery. Once installed, battery