First Alert SA305 Smoke Detector with Silence Feature

Long life 9V lithium battery included. 10-year battery warranty. Silence/Test Button. Silence or test alarm functions. Side Battery drawer. Slides open for easy battery replacement. Missing battery guard. Ensures a battery is placed inside the smoke alarm. Blinking power indication. Confirms unit is receiving power. Tamper Resistant. Optional pins to lock battery and unit in place. Loud 85-decibel alarm. Low battery warning.