First alert hardwired carbon monoxide alarm

Smoke and Carbon Monoxide Alarm LCD Display CO Detector Smoke Alarm Voice Alert Combination Smoke

Portable CO Detector, Travel CO Alarm with Sound & Flash Alert, Battery-Powered, Compact &

Natural Gas Detector ABS Ceiling Network Alert Sound and Light Alert Gas Alarm for Home Safe 12?28V

Plug-in Type Carbon Monoxide Alarm CO Detector Monitor with LED Digital Display Voice Alert for

2 In 1 Version WiFi Tuya Smart Co & Smoke Detector Alarm Carbon Monoxide Parlor Room Kitchen Shop Fire PIR Sound Sensor Alert