This CO2 meter for air quality monitoring can be used at home, in the office and in all indoor public spaces. Essential for air quality monitoring, it continuously measures and displays CO2 values (up to 9999 ppm). The LCD display screen shows the CO2 levels, temperature and humidity of the room. The large numbers are perfectly contrasted (yellow and blue numbers on a black background) to ensure they are easy to read. This CO2 air quality measurer has a USB charging cable included.