The AprilAire ZAWTHCPV Wi-Fi Healthy Air Monitor is a 5-in-1 air quality sensor used to measure particulate matter (PM2.5), fumes (TVOC), carbon dioxide (CO2), humidity (RH%), and temperature. With industry-leading detection, this is the only sensor on the market to detect unhealthy situations based on both EPA standards and real-time data trends. The Healthy Air App makes it easy to receive instant notifications and education regarding your home's Indoor Air Quality. Using an AprilAire Wi-Fi Thermostat (Model S86WMUPR or 8920W), integrate the Healthy Air Monitor with market-leading mitigation equipment to automatically address an issue when detected.