SITERWELL Smoke Detector, Hardwired Interconnected, Photoelectric Smoke Alarm with 9V Backup Battery, Fire Alarm with Test/Silence Button, ETL-9th Listed, GS562A, 10 Packs

HARDWIRED SMOKE DETECTOR - Hardwired interconnected smoke alarm can connect up to 12 alarms, they can be installed more flexibly at any location within the home to maximize coverage of the secure area. When one of alarms detects smoke, they all sound, more than 85 decibels of alarm sound, so you never miss an emergency and can get out faster.

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.