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SKU #: HNW1136

First Alert Battery Powered Smoke Alarm

(View all from First Alert)

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First Alert Battery Powered Smoke Alarm


  • Includes 9v battery
  • Smoke alarm
  • Ionization smoke sensor
  • Easy to use mute button and access battery drawer
  • Fez access battery door
  • Single smoke sensor
  • UL standards
  • With mute silences nuisance alarms from cooking smoke or shower steam
  • Single button also tests alarm functions
  • No need to remove alarm from ceiling to change battery
  • Manufacturer provides 10 years warranty


  • Overall: 2.3" H x 6.8" W
  • Overall Product Weight: 0.49lbs

First Alert Battery Powered Smoke Alarm

Weights & Dimensions

  • Overall: 2.3" H x 6.8" W
  • Overall Product Weight: 0.49lbs


Product Type: Smoke DetectorOrientation: Wall/Ceiling Mounted
Power Source(s): 9V BatteryGlobal Product Type: Smoke/Co Detectors-Smoke Detector
Mounting: WallCompliance, Standards: UL Listed
Quantity: 1 EachCountry of Manufacture: Mexico

About the Manufacturer

First Alert is the most recognized and trusted brand in home safety and security products, helping protect what matters most to you and your family. First Alert is a leading manufacturer of smoke alarms, carbon monoxide detectors, fire extinguishing products, safes, security cameras, fencing, doors, window guards, and many other home safety products. Please consider them a resource for the latest recommendations in home safety.

First Alert Battery Powered Smoke Alarm

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When you buy a First Alert Battery Powered Smoke Alarm online from Wayfair, we make it as easy as possible for you to find out when your product will be delivered. You can check on a delivery estimate for the First Alert Part #: SA303CN3 here. If you have any questions about your purchase or any other Smoke & CO Detectors product for sale our customer service representatives are available to help.Whether you just want to buy a First Alert Battery Powered Smoke Alarm or shop for your entire home, Wayfair has a zillion things home.
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Necessary produt to have

from North Richland Hills, TX – Verified Buyer

I bought these to replace old ones I had. Much better quality than my old ones. Easy to put up and loud sound if there is any smoke. Will purchase if need more.

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from Bronx, NY – Verified Buyer

pro-very loud con- too big very easy to assembly good quality

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Battery Powered Smoke Alarm is also sometimes listed under the following manufacturer numbers: SA303CN3