First Alert Brk Hardwired Combination Smoke and Carbon Monoxide Detector with Voice Alert in the Combination Smoke & Carbon Monoxide Detectors department at Lowes.com
Smoke Alarm BRK 4120 Teardown
First Alert BRK 9120B (10pack) AC Powered Smoke Detector Alarm w/Battery Backup - Walmart.com
BRK 86RAC Smoke Detector Replacement and Additions (UK) - My Blog