Kidde i12040 (6 Pack) Smoke Detector, 120V Hardwired Ionization w/9V Back-Up Battery (21006373) - 6 Pack

by Kidde


The Kidde i12040 (6 Pack) is for a 6 pack of hardwired ionization smoke alarms. These alarms provide a dependable warning against potential fires due to a quick installation. Additionally, these alarms have an included back-up battery that means it will operate even in situations where power to the building is lost.

These alarms can also be interconnected with up to 24 other Kidde-compatible alarms, providing even more thorough coverage. They feature a loud 85 dB alarm which, especially when connected to other models, means you'll be able to hear a single alarm no matter where you are in your home.

Features include a convenient Smart Hush button for quick silencing of nuisance alarms and a helpful one-touch button to test the unit's electronic circuitry. Alarm memory also creates a visual notification with a blinking LED light to show that the alarm was triggered.

The 120V, AC-powered alarm provides the earliest warning of smoke or fire threats, even during power outages. This model uses ionization sensing technology, which detects invisible fire particles (associated with flaming fires, as opposed to smoldering fires) sooner than photoelectric sensing alarms. Kidde strongly recommends that both ionization and photoelectric smoke alarms be installed to help insure maximum detection of the various types of fire that can occur within the home.


  • Hush feature temporarily silences nuisance alarms
  • One touch test button tests unit's electronic circuitry
  • Battery backup 9V battery included
  • Tamper resist locking pin helps deter alarm tampering and theft
  • UL Approved


  • Ordering Number: 21006373
  • Type: Ionization
  • Power: AC
  • Voltage: 120VAC
  • Battery Backup: Yes
  • Battery Type: 9 Volt
  • Alarms: Horn
  • Siren/Horn (dB): 85
  • Exit Light: No
  • Hush Button: Yes
  • Digital Readout: No
  • Test Buttons: Yes
  • Digital Readout: No
  • Test Buttons: Yes
  • Dia. (In.): 5.6
  • Height: 1.55
  • Operating Temp. (F): 40 to 100
  • Warranty Length: 5 Years
  • Provides: Early Warning of Smoke and Fire Hazards Even During Power Outages
  • For Use With Interconnectable Kidde Alarms
  • Locking Pin: Yes
  • Standards: UL Listed

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