First Alert 10-Year Battery-Operated Combination Smoke and Carbon Monoxide Detector in the Combination Smoke & Carbon Monoxide Detectors department at Lowes.com
First Alert Z-Wave Smoke and Carbon Monoxide Alarm, 3-pack | Costco
Siterwell Smoke & CO Combo Detector Alarm with Voice Speaker, Dual Sensor Fire and Carbon Monoxide Alarm, Auto-Check, Combination Alarm for Office Kitchen, 10-Year, UL 217 & UL 2034, GS886, 2 Pack -