Siterwell Hardwired Interconnected Smoke Detector, Photoelectric Smoke Alarm with 9V Backup Battery, Fire Alarm with Test/Silence Button, GS517 , 4 Packs
- 【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 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..