First Alert BRK SC9120B 120v Smoke/Carbon Monoxide CO Detector w/mounting base | eBay
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
Kidde Hardwired Smoke & Carbon Monoxide Detector, AA Battery Backup, Interconnectable, LED Warning Light Indicators - Amazon.com
Kidde 21006377N Smoke Alarm & Carbon Monoxide Detector Combo With Voice 5.75 In 120V AC AA Ionization Hardwired Diameter White