First Alert Hardwire Interconnect Smoke & CO Alarm with 10-Year Sealed Lithium Battery Backup (SMICO105-AC) best-selling The First Alert SMI105-AC Interconnect

The First Alert SMI105-AC Interconnect Hardwire Smoke Alarm with 10-Year Battery Backup uses First Alert's Precision Detection advanced sensing technology and meets the latest industry standards

Easy to install and maintain

Two AA batteries are included

With the toggle button on the spray head

First Alert Hardwire Interconnect Smoke & CO Alarm with 10-Year Sealed Lithium Battery Backup (SMICO105-AC) best-selling The First Alert SMI105-AC InterconnectInstall convenient 2 in 1 protection against both smoke and carbon monoxide with the First Alert SMICO105 AC Hardwire Interconnect Smoke and CO Alarm with 10 Year Battery Backup. Meets new industry standards and can interconnect with other compatible detectors to create a whole home alarm system to help provide an early warning.