The indoor module measures CO2 concentration (400-5000 ppm), temperature, humidity, and sound levels, giving a complete picture of indoor air quality alongside comfort metrics. The outdoor module is weather-resistant and battery-powered, so no outdoor cabling is required. Data streams to the Netatmo Weather app and to Weather Underground and Weathercloud community networks, contributing to hyper-local weather mapping. The Rain Gauge and Anemometer accessories extend the station into a full-featured personal weather station with rainfall accumulation and wind speed data. Apple HomeKit, Amazon Alexa, and IFTTT integrations allow weather-triggered automations.