Easy to use: CO2 measurement. The sensor module is very accurate. The carbon dioxide concentration can be accurately displayed. Humidity display and three measurement modes. If you have any questions about the product, please contact us freely Real-time detection: The CO2 sensor has a built-in high-performance chip and uses monitoring technology to report ventilation times. It captures pollution data more accurately and is small. The current generated during the electrochemical reaction is not limited by location or time, allowing accurate calculation of CO2 assessment, promoting daily infection control and a pleasant environment. Easy-to-read LCD display. The CO2 concentration meter is a large LCD display with good visibility. It displays CO2 concentration, temperature and humidity in capital letters. They are also color-coded at a glance. The brightness of the screen can be adjusted by pressing the left and right buttons on the power switch and adjusting the brightness according to