Involves 38-million made by Kidde and sold under a myriad of names. Kinda hard to figure out how to navigate thru the form but ours were on the recall and I would never have known if I hadn't stumbled across it by accident.
Check this out!
http://www.kidde.com/home-safety/en/us/
Check this out!
http://www.kidde.com/home-safety/en/us/