Kidde Fire Sentry Micro Profile 3 Year Smoke Alarm, 9 Volt Battery
Kidde Fire Sentry Micro Profile 3 Year Smoke Alarm, 9 Volt Battery
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Kidde Fire Sentry Micro Profile 3 Year Smoke Alarm, 9 Volt Battery

4.5 stars out of 1600 reviews
(4.5)|
1,600 ratings

Key item features

  • Compact Design: At only 4-inches in diameter, this smoke alarm is suitable for installation in tight spaces within homes, RVs, and mobile homes.
  • Ionization Detection: Utilizes ionization sensor technology to detect invisible fire particles associated with flaming fires sooner than photoelectric alarms.
  • Battery Powered: Operates on a 9-volt alkaline battery, providing reliable detection of smoke or fire even during power outages and allowing for easy, wire-free installation.
  • Audible Alert: When smoke or fire is detected, an 85-decibel alarm will sound, accompanied by a red LED indicator.
  • Convenient Features: Includes a test-hush button for battery operation checks and silencing nuisance alarms from cooking or shower steam, with a chirp indicating low battery.
  • Safety Standards: Meets the requirements of UL 217, NFPA72 (chapter 11 2002 edition), NFPA101 (One and two-family dwellings), and Federal Housing Authority (FHA).
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Current price is $9.99
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Columbus, 43215
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Customer ratings & reviews

4.5 out of 5 stars
stars1,600 ratings593 reviews
How item rating is calculated

Reviews summary

Pros
  • : Offers a low-cost option.
  • : Compact design and simple mounting system make it quick.
  • : Has a small, low profile.
  • : Offers protection without breaking the bank.
Neutral
  • : Can be easy to hang, but hole may be too small.
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Showing 1-3 of 593 reviews

Nov 26, 2025
Fidgety
Item details
Count per pack: 1
5 out of 5 stars review

Verified Purchase

Simple old school detector at a great price.

Simple old school detector at a great price. I got two more for other areas of the house. There's no fiddling with apps or settings, no wifi required. A couple screws to install the mounting bracket, add the included battery and twist into place = DONE.

Helpful?20AP8RHJACU925488877
reply from Kidde Expert

Thank you for sharing your feedback! We love seeing that our products work great for you!

Jan 29, 2026
ray
Item details
Count per pack: 2
5 out of 5 stars review

Verified Purchase

New smoke detector

It was easy to install and now I can rest in peace and confidence knowing I replaced my old one, it was chirping letting me know it was time to replace.

Helpful?20AP8RHJACU925488877
reply from Kidde Expert

Thank you for your glowing review! We’re thrilled to hear you enjoyed our Kidde Fire Sentry Battery Operated 4-inch Smoke Detector, and we will continue our efforts to provide innovative solutions to help create a safer world.

Dec 31, 2020
larry
5 out of 5 stars review

Verified Purchase

great life savers i do have pictures for warranty

life savers great an loud i ordered 10 of these i have have alarms just decided to get new ones i didnt have one inside hot water/electric furnace closet i put one inside on door we woke up 2am to an alarm in hall smelled a plastic melted or a melting wire my blower relay melted off cntl board- this small but loud detector saved us i took some to daughters put xtra n her house thank u"" Expect the unexpected""ppl buy these of these could save a life "your own"

Helpful?20AP8RHJACU925488877

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