Features: 1. Real-time monitoring and real-time display of carbon dioxide concentration per cubic meter, and can also detect and display the temperature and humidity of the environment to help users understand the environment. 2. Intelligent color screen display, clear numbers, easy to identify and read. It has a long service life and can be charged with a USB cable. 3. It is suitable for offices, homes, gymnasiums and other occasions, with a wide range of applications. 4. In the alarm mode, the user is prompted to pay attention to the environment by changing the color. 5. It is small and portable, easy to carry, does not take up too much space, and can be installed at home. Notice: 1.Actual color may be slightly different from the image due to different monitor and light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: ABS Measurement accuracy: 1ppm Measuring range: 400-6000ppm Working voltage: 3.7V Current: 160mA Power: 0.6W Battery: 3.7V, 1500mAh Size: 89 * 70 * 35mm Five functions in one: carbon dioxide, formaldehyde, TVOC, temperature, humidity Three in one function: carbon dioxide, temperature, humidity