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Alarm Type	Smoke
Power Source	Hardwired
Sensor	Ionization
Interconnects	Yes
Battery	9V

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The AC-powered, hardwired Kidde i12040 ionization smoke alarm is designed to protect you and your family from the dangers of smoke and fire. This smoke alarm's trademarked hush feature allows you to silence nuisance alarms, while an indicator LED and test feature let you easily confirm that the alarm is working. This wire-in smoke detector also has a battery-backup feature (with included 9-volt battery).

The Kidde i12040 Wire-In Ionization Smoke Alarm features Ionization sensing technology that detects invisible fire particles. Battery backup for continuous protection in case of power outage (battery included) Smart hush feature silences nuisance alarms. Pre-stripped wiring harness with tinned strands 10-year limited warranty. The smoke alarm also offers a tamper-resistant feature to deter vandalism or theft and a smart interconnect system that connects with up to 24 Kidde devices--including other smoke alarms plus carbon monoxide and heat alarms.

The battery-backup feature (9-volt battery included) provides protection even during power outages when many CO incidences occur. It has a large mounting base that helps protect surface paint from dirt and covers imperfections, and its pre-stripped wiring harness has an easy-off cap and tinned strands to increase conductivity.

By pressing the hush button, you can easily and safely silence nuisance alarms caused by non-emergency situations, such as overcooked dinners. This feature desensitizes the alarm for approximately seven minutes. During this time, the alarm chirps every 30 to 40 seconds. If the smoke is too dense, the hush feature is overridden and the alarm still sounds, and the alarm automatically resets at the end of the seven minutes. This convenient safety measure eliminates the temptation to remove the alarm's battery, which creates an unsafe situation.

The Kidde i12040 smoke alarm uses ionization sensing technology, which may detect invisible fire particles (associated with flaming fires) sooner than photoelectric alarms. Photoelectric sensing alarms may detect visible particles (associated with smoldering fires) sooner than ionization alarms. Kidde recommends that both ionization and photoelectric smoke alarms be installed to insure maximum detection.

Don't know what type of smoke alarm is right for your home? Check out our guide on how to choose the right smoke detector for your home.

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In The Box

1 x Kidde i12040 AC Wire-in Smoke Alarm
1 x 9-volt battery
1 x Mounting Bracket
1 x Power Connector
1 x Dust Cover
1 x English/ Spanish Instructions Manual

Info & Guides

User manual

Spec sheet

Kidde - i12040 Smoke Detector, 120V Hardwired Ionization Rear Load w/Hush Button, Battery Backup (21006378) (1275)