Best Nest Smoke Detector

Airthings 2911 Wave Plus, Black LTD Edition - Radon & Air Quality Monitor (CO2, VOC, Humidity, Temp, Pressure)

360° View 2K Pet Camera with Phone App, Indoor Security Camera, P2T Baby Monitor, Pan/Tilt, Motion & Sound Detection, Night Vision,Two-Way Audio, Works with Alexa

First Alert CO605A Carbon Monoxide Plug-In Alarm with Battery Backup

Airthings Wave Radon - Smart Radon Detector with Humidity & Temperature Sensor – Easy-to-Use – Accurate – No Lab Fees – Battery Operated - Free App

Kidde Smoke Detector, Hardwired with Battery Backup & Interconnect, Battery Included

Govee WiFi Digital Hygrometer Thermometer 3 Pack, Indoor Outdoor Smart Gateway Room Temperature Humidity Sensor, Wireless Temp Gauge with App Alert, for Home, Greenhouse(not Support 5G WiFi)

FIRST ALERT Smoke and CO Alarm, SC7010BA, White

First Alert 9120BA Hardwire Smoke Alarm w/ 9V Battery, Smoke Detector

First Alert SC9120BA Hardwire Combination Carbon Monoxide and Smoke Alarm

Airthings 2960 View Plus - Radon & Air Quality Monitor (PM, CO2, VOC, Humidity, Temp, Pressure)