The Kidde 20SDR is a battery-operated smoke alarm featuring advanced photoelectric sensing technology designed to detect visible fire particles and reduce nuisance alarms caused by cooking steam. This compact 5-inch circular unit is powered by two replaceable AA alkaline batteries, ensuring continuous protection even during power outages. It features a loud 85-decibel audible alert and a multi-color LED indicator system: a flashing red light for alarm mode, amber for operating errors, and green for normal status. The device includes a convenient test/hush button for easy maintenance and a 10-year end-of-life notification to signal when the unit requires replacement. Designed for easy installation, it comes with a twist-and-click mounting bracket suitable for hallways, living areas, and bedrooms