NWOT First Alert Photoelectric Smoke Detector pack of 6 battery operated 85-dec

NWOT First Alert Photoelectric Smoke Detector pack of 6 battery operated - 1.9"D x 1.9"W x 2"H 🔋 BATTERIES NOT INCLUDED photoelectric smoke alarm offers reliable smoke detection in a ultra-compact design; extended-life up to 10 years of monitoring, requiring no battery changes for the life of the alarm Photoelectric sensor detects smoke from smoldering fires while minimizing false alarms Easy mounting bracket - COMES WITH MOUNTING HARDWARE Battery-operated unit provides continuous monitoring even if there's a power failure Alarm also features loud 85-decibel alarm a single test/silence button, and an end-of-life signal so you know when to replace the unit