Whether in an office, company, factory building, or educational institution: The current CO2 levels can be quickly and reliably retrieved on the backlit screen, allowing for flexible concentration monitoring. The functional device clearly displays not only the CO2 concentration but also the temperature, humidity, date, and time. Particularly illustrative: Air quality is represented using emojis, enabling a quick and easy assessment of the situation at a glance. If a critical value is reached, a visual and alarm function will alert you. Additionally, if the battery is running low, a screen display will timely indicate that the measuring device should be charged with the included micro-USB cable.