*Replaces Model# i9040*10SDR - COMPACT BATTERY POWERED 4" SMOKE DETECTOR WITH ALARM LED WARNING LIGHT*Compact & Modern Design - 4-inch design is ideal for small spaces.*Enhanced Sensing Technology - Reduces false alarms often caused by cooking.*Fast Alerts - upon sensing smoke or fire, an 85-decibel alarm sounds & a red LED will illuminate.*Simple Installation - No wiring needed, install with the included twist-and-click mounting bracket.*Self-Testing - For added assurance, internal components ensure alarm is always operating as expected. (Self-testing is not a substitute for a weekly manual push test of the alarm.)*Test & Hush button makes it easy to test the smoke detector and silence false alarms, should they occur.*Battery Replacement - a low battery chirp alerts you when batteries need replacing.*End-of-Life Alarm - alarm sounds as a reminder when it is time to replace the alarm after 10 years of use after its original power-up date .*Red LED Light - Displays a single red LED light that blinks every 60 seconds to indicate the alarm is on and working.*10-Year Limited Warranty*