The wall or table CO2 display is the latest development of an affordable display device that simultaneously measures and records CO2, humidity, and temperature. Equipped with the ROTRONIC HYGROMER IN-1 humidity sensor, which has been tested and confirmed in the field for years, this measuring device offers unbeatable value for money. The device can be configured directly using buttons, and stored data can be downloaded to a USB stick and analyzed with the free ROTRONIC software SW21. Applications for indoor air quality include classrooms, kindergartens, meeting rooms, open-plan offices, shopping centers, and gyms.