Google Nest Protect - Smoke Alarm and Carbon Monoxide Detector - Battery Operated S3000BWES - The Home Depot
SITERWELL WiFi Smoke Detector Carbon Monoxide Detector Combo, 2 in 1 Smart Fire and CO Alarm Detector with Voice Guide, Replaceable Battery, Auto-Check, Conforms to UL 217 & UL 2034 Standards, 2Pack - Walmart.com
FUMA II - HD WIFI Nanny Cam Dummy Smoke Detector with IR Night Vision and 6 Months Battery Life
10 Year Battery Wifi Function Tuya Smart Life Smoke Detector Home Parlor Child Room Kitchen Shop Fire Sound Alarm Sensor - Smoke Detector - AliExpress