Kidde i12040 Hardwire Smoke Alarm with Hush Feature and Battery Backup Alkaline Battery

From the Manufacturer The Kidde i12040 is a 120-Volt AC hardwired powered ionization smoke alarm with 9-Volt battery back-up and Hush feature. This smoke alarm has the ability to function as a single unit or in an interconnected system. Install UL listed smoke alarms on every floor of your home, in hallways, inside bedrooms and outside of sleeping areas. Replace smoke alarms every 10 years. Ionization sensing alarms may detect invisible fire particles sooner than Photoelectric alarms. Studies show both types will effectively detect either type of fire. For optimal protection, install both smoke alarm technologies in your home. This smoke detector has a Quick Connect wiring system that makes it simple to install the unit and easy upgrade to a new detector when the time comes. The multi-station Interconnect system allows you to easily connect multiple detectors together so that when one alarm triggers in an area of the house, condo or apartment, the others sound at the same time. Units must all be Kidde compatible.