2x Siterwell Photoelectric Hardwired Smoke Detector Alarm With 9v Battery Backup

Description

SITERWELL Hardwired Interconnected Smoke Detector, Photoelectric Smoke Alarm with 9V Backup Battery, Fire Alarm with Test/Silence Button, GS517,2 Packs
Product Description
HARDWIRED SMOKE DETECTOR - Hardwired interconnected smoke alarm, can connect up to 12 alarms. It is more precise and stable than wireless interconnection.
INTERCONNECTION TEST - If the fire detectors are interconnected, you only need to press one test button during the weekly test, and the rest can be tested at the same time.
BACKUP 9V BATTERY - The fire alarm is powered by a 120V power and a 9V backup battery. The alarm battary will last for at least 1 year, providing protection in the event of a power outage.
SILENCE MODE - Worried about false positives? The smoke detector has a silence button, you can hold it down for five seconds to calm it.
SIZE & CAPABILITY - 5” diameter x 1.6” depth, UL217 certified. Home fires start every 83 seconds, the fire detector can quickly identify the fire and allow the family to flee quickly.
Fault Mode
If the alarm detection signal decays to below threshold, the detector chirp occurs without LED flashes every 32 seconds.
Low Battery Mode
When the detector's backup battery voltage is low than threshold, an intermittent “chirp” with red LED flashes once every 32 seconds.
Silence Mode
Press the test button at least 2 seconds, it will be paused the unit alarming for approx 8 minutes. At this time, the red LED will flash once every 8 seconds.
Photoelectric Technology
It is more sensitive to detecting slow smolder fires which general thick, black smoke and may smolder for hours before bursting into flames.