Features: Measure and display Carbon Dioxide (CO2) levels to monitor air quality in workspaces and living areas Volatile Organic Compound (VOC) level warning provides indication of air quality and monitors the affects of commonly found gases such as Formaldehyde,Toluene (found in many solvents and cleaners) and smoke Measure ambient air temperature and humidity Easy to use, just plug the power supply into a standard outlet and begin monitoring High sensitivity of +/- 20 ppm CO2