THREE First Alert Smoke & Carbon Monoxide Alarms Only $79.99 Shipped at Costco | Works w/ Smart Homes
First Alert Brk 10-Year Battery 6-Pack Battery-operated Combination Smoke and Carbon Monoxide Detector in the Combination Smoke & Carbon Monoxide Detectors department at Lowes.com
Costco Members: 3-Pack First Alert Z-Wave Smoke and Carbon Monoxide Alarm