First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup, 1-Pack Activ Life The shelf life is 9

The shelf life is 9 months when not opened under normal storage conditions

Sized Just Right: Small fits most kids size 4-6

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First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup, 1-Pack Activ Life The shelf life is 9Brand: FIRST ALERT Color: White Features: First Alerts Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency Through early warning interconnect, when one alarm sounds, all compatible Quick Connect Plug allows for easy installation with no need to rewire Battery backup provides continuous protection during power outages Test