Compare Quick view Kidde Kidde Hardwired w/10 Year Lithium Battery Backup Smoke and Carbon Monoxide Detector Alarm with Voice Warning - i12010SCO MSRP: Now: $89.50 Was: The Kidde i12010SCO is a hardwired combination smoke and carbon monoxide alarm that contains a 10-year, sealed battery backup. This alarm uses breakthrough technology to offer a fast response to real fires, including smoldering and fast-flaming, as well... MSRP: Now: $89.50 Was: Compare Quick view