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