Clear display: The interface display 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 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 meter has a long battery life, a 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 air quality monitor will sound an alarm to remind the user to care about the environment and open the windows for ventilation.