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

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

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

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

Google Nest Protect - Battery

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

Kidde P4010ACLEDSCOCA 120 VAC Integrated 3-in-1 LED Strobe and 10-Year Talking Smoke & CO Alarm

First Alert SC9120BA Hardwire Combination Carbon Monoxide and Smoke Alarm