Clear display: The interface display is slightly different in different scenes. The LCD screen allows you to read easily and clearly. Real-time monitor: This air quality monitor provides real-time monitoring of carbon dioxide concentration per cubic meter, and It can detect and display the temperature, humidity and carbon dioxide concentration of the environment to help users understand the environment. Wide applications: perfect for office, home, gym, restaurant, sports venues and other occasions, and it is versatile. Long Battery Life: Our CO2 comes with a long battery life, 'standby time of up to 8-12 hours and can be charged with a USB cable. Alarm function: When the carbon dioxide concentration exceeds 1000 ppm, this water quality monitor the air sounds an alarm to remind the user to care about the environment and open windows for ventilation.