4. It offers a variety of customizable settings, including screen-off timing, CO2 calibration, temperature unit switching, and sound and vibration toggles, making your user experience more personalized and convenient. 3. Equipped with an air quality classification function, the portable carbon dioxide detector uses four different colors to correspond to various air quality levels, providing a more accurate and visual understanding of the current air situation. When the CO2 concentration reaches 1500PPM, the device automatically vibrates and sounds an alarm. 1. The CO2 temperature humidity monitor boasts a small and exquisite body, featuring a sleek and modern appearance with a structure for easy portability. 2. Utilizing Non-Dispersive Infrared (NDIR) technology, the carbon dioxide monoxide detector tester accurately displays the concentration of carbon dioxide in the air in real-time. With a high resolution of up to 1PPM and a measurement accuracy of ±50+5% , it ensures the data's accuracy and reliability. This device also integrates temperature and humidity detection features, enabling you to track the air quality around you no matter where you are. 5. The CO2 detector features an automatic brightness adjustment function that adjusts the screen brightness according to ambient light, saving power. Even with the screen off, you can monitor carbon monoxide levels to conserve battery life., Weight: 0.31085178942 pounds, Manufacturer: NONDK