SITERWELL Smoke Detector, Photoelectric Fire Alarm with 9V Backup Battery, Hardwired Smoke Alarm Interconnected, Fire Detectors with Test/Silence Button for Home Safety (10 Packs) — Open-Box, 6% Off

【Advanced Photoelectric,Reduce False】Alarms Equipped with high-sensitivity photoelectric smoke sensor, this electric smoke alarm responds in 1 second and delivers 5x higher accuracy than traditional detectors. It effectively identifies slow smoldering fires and combustion particles, greatly minimizing false alarms from cooking and daily interference. Real-time monitoring provides reliable home fire safety protection for kitchen, living room and whole-house use.

10-YEAR PRODUCT LIFE - Hardwired smoke detectors can be used for ten years, are equipped with DC 9V batteries, providing protection in the event of a power outage. If low battery there will be a signal alarm, which informs you to change a new battery.

FAST ALERTS - Enhanced sensing technology that respond quickly to smoke, enhancing fire warning capabilities. It can more accurately detect smoke from smoldering fires, reduces false alarms often caused by cooking.

DO NOT DISTURB MODE - Hardwired interconnected smoke detector detects low voltage or a fault, pressing the test button activates a Do Not Disturb mode for approximately ten hours, preventing frequent alarms and flashing at night, ensuring your sleep is not disturbed.

TEST/LED NOTIFICATIONS - Hardwired interconnected smoke detector you only need to press one test button during the weekly test, and the rest can be tested at the same time. If the smoke alarm is in normal working condition, the green LED light is always on and the red LED light flashes every 40 seconds.

SIMPLE INSTALLATION - The included wall plate fits most smoke detectors on the market, secure installation with the provided screws. Product size: 5.67in/144mm,1.5in/38mm.