The Large Character Wall CO2 Monitor is an easy-to-read and cost-effective air quality indicator for large spaces. At 11.6 x 8.25 inches (about the size of a piece of notebook paper) it is easy to read from across almost any room.
The large LED display shows the 3 most critical parameters of indoor air quality: CO2 level, temperature and relative humidity. In addition, it has a green, yellow and red IAQ level indicator that makes it easy for anyone to understand.
It is easy to use: just plug it in, and it will begin to measure indoor air quality instantly. It has no moving parts, and is designed to last for years.