Kidde AC Plug-in Carbon Monoxide Alarm

https://www.kidde.com/home-safety/en/us/products/fire-safety/co-alarms/kn-cob-lcb-a 2014

https://canadalite.com/Kidde-900-0215-005-Carbon-Monoxide-Alarm-KN-COB-LCB-CA

https://www.shopfrancis.com/products/900-0215-kidde-carbon-monoxide-alarm-model-kn-cob-b-lcb-a-ca

 https://www.kidde.com/home-safety/en/us/support/help-center/browse-articles/articles/why-is-my-carbon-monoxide-alarm-beeping-or-chirping.html