First Alert 10-Year Battery-Operated Combination Smoke and Carbon Monoxide Detector in the Combination Smoke & Carbon Monoxide Detectors department at Lowes.com
Review: First Alert's Onelink Smoke + Carbon Monoxide Alarm, the HomeKit smoke detector [Video] - 9to5Mac
Shield EX 3.0-S Behind-the-Panel CO Detector - Altus/Illyrian Compatib
Netatmo debuts new HomeKit-compatible smart CO detector | AppleInsider