![Gentex 918-0021-002, Model: GN-503FF is a 120VAC/9VDC single or multiple station combination photoelectric smoke/electrochemical carbon monoxide alarm with tandem interconnect capabilities and dual, independent relays that activate independently for smo Gentex 918-0021-002, Model: GN-503FF is a 120VAC/9VDC single or multiple station combination photoelectric smoke/electrochemical carbon monoxide alarm with tandem interconnect capabilities and dual, independent relays that activate independently for smo](https://www.tclifesafety.com/cdn-cgi/image/quality%3D85/assets/images/productimages/gentex_503series.jpg)
Gentex 918-0021-002, Model: GN-503FF is a 120VAC/9VDC single or multiple station combination photoelectric smoke/electrochemical carbon monoxide alarm with tandem interconnect capabilities and dual, independent relays that activate independently for smo
![First Alert BRK SC-9120B Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup - Combination Smoke Carbon Monoxide Detectors - Amazon.com First Alert BRK SC-9120B Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup - Combination Smoke Carbon Monoxide Detectors - Amazon.com](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/71bOL6iOrqL._AC_UF894,1000_QL80_.jpg)
First Alert BRK SC-9120B Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup - Combination Smoke Carbon Monoxide Detectors - Amazon.com
![FIRST ALERT BRK CO5120BN Hardwired Carbon Monoxide (CO) Detector with Battery Backup , White - Household Alarms And Detectors - Amazon.com FIRST ALERT BRK CO5120BN Hardwired Carbon Monoxide (CO) Detector with Battery Backup , White - Household Alarms And Detectors - Amazon.com](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/71qz4R1Mj9L._AC_UF1000,1000_QL80_.jpg)
FIRST ALERT BRK CO5120BN Hardwired Carbon Monoxide (CO) Detector with Battery Backup , White - Household Alarms And Detectors - Amazon.com
![i12010SCOCA 120V AC Worry-Free Smoke & Carbon Monoxide Alarm with 10-Year Sealed-in Battery Backup | Kidde Canada i12010SCOCA 120V AC Worry-Free Smoke & Carbon Monoxide Alarm with 10-Year Sealed-in Battery Backup | Kidde Canada](https://images.carriercms.com/image/upload/w_350,h_350,c_scale,dpr_3.0,q_auto,f_auto/v1551119367/kidde/products/smoke-alarms/kidde-smoke-alarm-i12010SCO-CA.jpg)
i12010SCOCA 120V AC Worry-Free Smoke & Carbon Monoxide Alarm with 10-Year Sealed-in Battery Backup | Kidde Canada
![First Alert Hardwired 120V Electrochemical/Ionization Carbon Monoxide and Smoke Alarm (6-Pack) - Henery Hardware First Alert Hardwired 120V Electrochemical/Ionization Carbon Monoxide and Smoke Alarm (6-Pack) - Henery Hardware](https://6598-cdn.dib-moce-cdn.info/Data/ItemImage-844944-sptmfsccjtxhmsms63b6f.jpg?AutoCrop=1&CropHeight=1440&CropWidth=1440&Height=1440&Padding=1&Quality=50&Resize=Auto&Revision=xts2&Timestamp=Jddt3G&Width=1440)
First Alert Hardwired 120V Electrochemical/Ionization Carbon Monoxide and Smoke Alarm (6-Pack) - Henery Hardware
![Kidde Firex Smoke & Carbon Monoxide Detector, Hardwired with nine-V Battery Backup & Voice Alarm, 3-Pack 21029901 - The Home Depot Kidde Firex Smoke & Carbon Monoxide Detector, Hardwired with nine-V Battery Backup & Voice Alarm, 3-Pack 21029901 - The Home Depot](https://images.thdstatic.com/productImages/1d92eb7a-bbf3-4994-a518-5310ec32273b/svn/kidde-smoke-and-carbon-monoxide-detectors-21029901-40_600.jpg)
Kidde Firex Smoke & Carbon Monoxide Detector, Hardwired with nine-V Battery Backup & Voice Alarm, 3-Pack 21029901 - The Home Depot
![Kidde Hardwired Interconnectable Smoke and Carbon Monoxide Detector with AA Battery Backup and Voice Alerts 21032082 - The Home Depot Kidde Hardwired Interconnectable Smoke and Carbon Monoxide Detector with AA Battery Backup and Voice Alerts 21032082 - The Home Depot](https://images.thdstatic.com/productImages/10c92100-4644-4470-9114-be90ed6e1b78/svn/kidde-smoke-and-carbon-monoxide-detectors-21032082-64_600.jpg)
Kidde Hardwired Interconnectable Smoke and Carbon Monoxide Detector with AA Battery Backup and Voice Alerts 21032082 - The Home Depot
![Kidde Firex Hardwired Inter-Connectable 120-Volt Auxiliary Heat Detector 135 Degree with Battery Backup 21029895 - The Home Depot Kidde Firex Hardwired Inter-Connectable 120-Volt Auxiliary Heat Detector 135 Degree with Battery Backup 21029895 - The Home Depot](https://images.thdstatic.com/productImages/74e4908f-e10c-448a-bb7c-e025e1d56be8/svn/kidde-heat-detectors-21029895-64_1000.jpg)
Kidde Firex Hardwired Inter-Connectable 120-Volt Auxiliary Heat Detector 135 Degree with Battery Backup 21029895 - The Home Depot
![900-0119 120V AC Talking Smoke & Carbon Monoxide Alarm with 2 AA Front-Loading Battery Backup | Kidde Canada 900-0119 120V AC Talking Smoke & Carbon Monoxide Alarm with 2 AA Front-Loading Battery Backup | Kidde Canada](https://images.carriercms.com/image/upload/w_350,h_350,c_scale,dpr_3.0,q_auto,f_auto/v1551119470/kidde/products/carbon-monoxide-alarms/kidde-carbon-monoxide-alarm-KN-COSM-IBA-CA.jpg)
900-0119 120V AC Talking Smoke & Carbon Monoxide Alarm with 2 AA Front-Loading Battery Backup | Kidde Canada
![Kidde Smoke & Carbon Monoxide Detector with Voice Alerts, Battery Powered, Combination Smoke & CO Alarm - Amazon.com Kidde Smoke & Carbon Monoxide Detector with Voice Alerts, Battery Powered, Combination Smoke & CO Alarm - Amazon.com](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/61tI9Tu-zIL.jpg)