The Firex Smoke Detector, Smoke Alarm, 4-Pack uses a 120-V power source with a nine-V alkaline battery backup so your home is always protected. This detector will warn you of fire particles, even if the power is out. The green LED lets you know it's receiving power and the red LED flashes for standby, if the alarm senses smoke, fire, combustion, hush mode and alarm memory if it is activated. They are UL certified with a 10-year limited warranty and meets requirements of UL217, NFPA72, The State of California Fire Marshall, NFPA 101, FHA and HUD.
Cheapest price in the interval: 54.97 on January 15, 2022
Most expensive price in the interval: 54.97 on February 13, 2022
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