qingpingAir Monitor Lite, Apple HomeKit-compatible Wi-Fi air quality sensor, detects CO2, PM2.5, PM10, indoor temperature and humidity

Qingping Air Monitor Lite, Apple HomeKit Compatible Wi-Fi Indoor Air Quality Meter Detects Home CO2, PM2.5, PM10, Temperature, and Humidity

SAF Aranet4 Home: Wireless Indoor Air Quality Monitor for Office or School (CO2, Temperature, Humidity and More) Portable, Battery Powered, E-Ink Screen, App for Configuration & Data History