Help protect your home and family with the Kidde 20SAR Smoke Detector with Hardwired AC Operation and AA Battery Backup. Designed to help provide peace of mind, this alarm detects smoke over 25% faster*, sounding a loud 85-decibel alert with a red LED light. The unit connects directly to 120V AC power and includes two AA alkaline batteries for backup operation, helping maintain continuous detection during power outages. Advanced sensing technology helps reduce false alarms from everyday cooking or steam while ensuring quick, accurate detection when smoke is present. With interconnect capability, multiple Kidde alarms can sound together, helping ensure everyone in the home is alerted to potential hazards.*** Tested to meet UL 217 10th Edition and FCC standards, this smoke detector supports reliable, code-compliant safety. Backed by a 10-year limited warranty** from date of purchase, the 20SAR is suitable for homeowners, property managers, and professionals seeking long-term, dependable fire safety assurance. *29% faster average smoke detection based on internal testing of smoldering wood fires for Kidde 9th Edition vs. leading competitor 8th Edition products. **10-year limited warranty on alarm. Not a battery performance claim. ***Different models offer different interconnection options and requirements. Check the User Guide for more info.