1Multipurpose: Can monitor and display the carbon dioxide concentration per cubic meter in real time, and can detect and display the temperature and humidity of the environment, to help users understand the environment. 2Alarm Reminder: In alert mode, by changing the color, prompt the user to pay attention to the environment. Automatically switch between horizontal and vertical screens, easy to read. 3Color Screen Display: Smart color screen display, clear numbers, easy to identify and read, can help users understand the environment, to meet your various need. 4Compact and Portable: Carbon dioxide detector is compact and portable, easy to carry, does not take up too much space, and can be installed at home. 5Wide Applications: This temperature and humidity tester is widely used in a variety of situations, such as agricultural planting, production warehouses, laboratories, homes, office, gym, etc.