![Amazon.com: First Alert Hardwired Heat Alarm with Battery Backup, BRK Brands HD6135FB : Everything Else Amazon.com: First Alert Hardwired Heat Alarm with Battery Backup, BRK Brands HD6135FB : Everything Else](https://m.media-amazon.com/images/I/81bsIijtF7S._AC_UF894,1000_QL80_.jpg)
Amazon.com: First Alert Hardwired Heat Alarm with Battery Backup, BRK Brands HD6135FB : Everything Else
![240V Hard Wired Photoelectric Smoke Alarm 10 Year Lithium Backup Battery | Smoke Alarms | Electrical Accessories | Voltex Electrical 240V Hard Wired Photoelectric Smoke Alarm 10 Year Lithium Backup Battery | Smoke Alarms | Electrical Accessories | Voltex Electrical](http://www.voltexelectrical.com.au/images/product/large/SAS135MH_01Main.jpg)
240V Hard Wired Photoelectric Smoke Alarm 10 Year Lithium Backup Battery | Smoke Alarms | Electrical Accessories | Voltex Electrical
![Kidde Hardwired Smoke & Carbon Monoxide Detector, Battery Backup, Interconnectable, LED Warning Light Indicators - Amazon.com Kidde Hardwired Smoke & Carbon Monoxide Detector, Battery Backup, Interconnectable, LED Warning Light Indicators - Amazon.com](https://m.media-amazon.com/images/I/61-B9PxPuVL.jpg)
Kidde Hardwired Smoke & Carbon Monoxide Detector, Battery Backup, Interconnectable, LED Warning Light Indicators - Amazon.com
![Kidde Firex Smoke Detector, Hardwired with nine-V Battery Backup & Front-Load Battery Door, Smoke Alarm, 4-Pack 21030967 - The Home Depot Kidde Firex Smoke Detector, Hardwired with nine-V Battery Backup & Front-Load Battery Door, Smoke Alarm, 4-Pack 21030967 - The Home Depot](https://images.thdstatic.com/productImages/77fae3ef-9c9b-467b-a1b4-d3b8bd5d9995/svn/kidde-hardwired-smoke-detectors-21030967-e1_600.jpg)
Kidde Firex Smoke Detector, Hardwired with nine-V Battery Backup & Front-Load Battery Door, Smoke Alarm, 4-Pack 21030967 - The Home Depot
![FIRST ALERT BRK 9120LBL Hardwired Smoke Detector with Adapter Plugs for Easy Replacement , White - Amazon.com FIRST ALERT BRK 9120LBL Hardwired Smoke Detector with Adapter Plugs for Easy Replacement , White - Amazon.com](https://m.media-amazon.com/images/I/61cbwQRHEeL._AC_UF350,350_QL80_.jpg)
FIRST ALERT BRK 9120LBL Hardwired Smoke Detector with Adapter Plugs for Easy Replacement , White - Amazon.com
![Kidde Hardwired Smoke Detector, 10-Year Battery Backup, Interconnect, Test-Silence Button - Amazon.com Kidde Hardwired Smoke Detector, 10-Year Battery Backup, Interconnect, Test-Silence Button - Amazon.com](https://m.media-amazon.com/images/I/41mubFCNxYL.jpg)
Kidde Hardwired Smoke Detector, 10-Year Battery Backup, Interconnect, Test-Silence Button - Amazon.com
![Google Hardwired Smart Combination Smoke and Carbon Monoxide Detector with Voice Alert in the Combination Smoke & Carbon Monoxide Detectors department at Lowes.com Google Hardwired Smart Combination Smoke and Carbon Monoxide Detector with Voice Alert in the Combination Smoke & Carbon Monoxide Detectors department at Lowes.com](https://mobileimages.lowes.com/productimages/e4b33a7e-cf83-4e67-a443-8bb85d7cf67e/12482308.jpg?size=pdhism)