Discover exceptional fire safety with the Kidde Hardwired AA Battery Backup Smoke Detector, Wire-Free Interconnect, Voice Alerts, LED Warning Light Indicators model 20SAR-VRF. This smoke detector features hardwired and wire-free interconnect with other detectors so when one alarm sounds, they all do, so you never miss an emergency (see user guide for compatibility with other Kidde models). For the convenience of wireless interconnect, detectors connect to existing hardwired alarms and to wire-free battery alarms. This smoke detector has enhanced sensing technology that reduces nuisance alarms caused by cooking. Fast alerts help give your family more time to evacuate 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, this 5-inch smoke alarm is powered by 120V AC wiring with wire-free interconnect and 2 AA alkaline replaceable backup batteries (included) for continual detection even during power outages. This detector is easy to install with the included twist-and-click mounting bracket. Meets requirements of 10th Edition UL 217, FCC, and CSFM.