First Alert BRK SC-9120B Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup

Superior carbon monoxide sensor and dual ionization smoke alarm Inter-connectable with BRK and First Alert hardwired smoke and carbon monoxide alarms Easy to install universal mount bracket Simple to use silence/test button; separate smoke and CO latching alarm indicators 9-volt battery included; 7-year limited warranty Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety