First Alert Hardwire Interconnect Smoke & CO Alarm with 10-Year Sealed Lithium Battery Backup (SMICO105-AC) best-selling Excalibur’s carbon block cartridges are

Excalibur’s carbon block cartridges are highly effective at removing chlorine

Two AA batteries are included

The Kidde P4010ACLEDSCOCA is a cUL Listed

Easy to install and maintain

The sleek design features a curved handle and ergonomic spray head

First Alert Hardwire Interconnect Smoke & CO Alarm with 10-Year Sealed Lithium Battery Backup (SMICO105-AC) best-selling Excalibur’s carbon block cartridges areInstall 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.