Features: The desktop CO2 monitor has real-time monitoring and real-time display of carbon dioxide concentration per cubic meter. The detector is small and portable, easy to carry, which does not take up too much space and can be installed at home. With intelligent color screen display and clear numbers, the detector display is easy to identify and read. The monitor can detect carbon dioxide, temperature and humidity. It can be used directly by plugging in the USB cable. It can detect and display the temperature and humidity of the environment to help users understand the environment. Specifications: Material: ABS Size: 89x70x35mm/ 3.5x2.75x1.37 in Color: : Black/White Package Includes: 1X Carbon Dioxide Detector note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.