First Alert Brk 10-Year Battery Hardwired Combination Smoke and Carbon Monoxide Detector Item #5404639 | Model #SHX65CM5N It fits a rough duct

It fits a rough duct opening 30 inches wide by 10 inches long

Easy to install and replace

We carefully select materials to ensure the safety of you and your family

ADA COMPLIANT: Product is ADA compliant when properly installed

and tight-fitting lid

First Alert Brk 10-Year Battery Hardwired Combination Smoke and Carbon Monoxide Detector Item #5404639 | Model #SHX65CM5N It fits a rough ductThe BRK SC9120LBL hardwired smoke and carbon monoxide combination alarm with 10 year battery back up features an ionization smoke sensing chamber and an electrochemical carbon monoxide sensor. The 10 year battery backup allows for continued monitoring, for the life of the alarm, even during power outages. Intelligent sensing technology is designed to reduce nuisance alarms and one button silences them if they do occur. The latching alarm indicator