This recall involves Kidde residential smoke alarm model i12010S with manufacture dates between December 18, 2013 and May 13, 2014, combination smoke/CO alarm il2010SCO with manufacture dates between December 30, 2013 and May 13, 2014, and combination smoke/CO alarm model KN-COSM-IBA with manufacture date between October 22, 2013 and May 13, 2014. They are hard-wired into a homeâ€™s electric power. The il2010S and il2010SCO come with sealed 10 year batteries inside. The KN-COSM-IBA model has a compartment on the front for installation of replaceable AA backup batteries. The alarms are white, round and measure about 5 to 6 inches in diameter. Kidde is engraved on the front of the alarm. Kidde, the model number and manufacture dates are printed on a label on the back of the alarm. “Always On” is also engraved on the front of alarms with sealed 10-year batteries.