The CO210 is a desktop indoor air quality CO2 monitor and datalogger. The measurement ranges are 0 to 9,999 ppm (CO₂), 14 to 140°F (-10 to 60°C) for air temperature, and 0.1 to 99.9% for relative humidity. It has a minimum/maximum CO2 value recall, a year/month/date/time display, an automatic baseline calibration (minimum CO2 level over 7.5 days), and manual calibration in fresh air. Comes with an AC adaptor and a user manual.