<p>Kidde Battery-Operated Photoelectric Smoke Detector Alarm, 4-Inch, Batteries Included</p> <p>Experience the next level of fire safety with the Kidde Battery-Operated Photoelectric Smoke Detector Alarm, 4-Inch, Batteries Included, model 10SDR, a compact, 4-inch smoke detector that uses photoelectric sensor technology to detect visible fire particles associated with smoldering fires. New, 9th Edition sensor technology reduces false alarms often caused by cooking or shower steam, while internal components of the smoke alarm self-test to ensure that it's always operating as expected. (Self-testing is not a substitute for a manual push test of the alarm. Perform a button test once per week to verify proper alarm operation.) The Kidde Smoke Detectors' compact, 4-inch design, which is smaller than the average 5-inch smoke detector, provides smoke detection in small spaces, such as a mobile home, RV, or crawlspace. When smoke or fire is detected, an 85-decibel alarm will sound and a red LED light will illuminate. The Kidde Photoelectric Smoke Detector is powered by 2-AA alkaline batteries (included), providing peace-of-mind smoke detection coverage during a power failure. Installation is easy &amp; requires no wiring - simply mount the bracket onto the ceiling &amp; twist and click the smoke alarm into the bracket. The Kidde Smoke Detector will chirp when the alkaline batteries need replacing or as a reminder when its time to replace the alarm, at the end of its 10-year life span. A test-hush button allows you to test the battery operations as well as silence nuisance alarms, should they occur. Install a smoke detector &amp; carbon monoxide detector on every level of your home and near bedrooms to help keep your family safe from fire &amp; poisonous gas. UL Listed with a 10-year limited manufacturer's warranty, which begins when the smoke alarm is powered on. Warranty begins when the smoke alarm is powered on. If that date is unknown, it should be assumed that alarms should be replaced. The 10-Year limited warranty is not a battery performance claim. Meets requirements of 9th Edition UL 217 and FCC. Does not meet requirements for CSFM or California Prop 65. Feel confident when you buy from Kidde, the #1 home fire safety brand in North America*. *Based on total household alarm installations as of December 2023.</p>