Compact and Fashionable: The 5-in-1 air quality detector features a compact design and fashionable appearance, making it easy to carry and use anywhere. Clear Color Screen: With a clear 9-inch color screen and a resolution of 240 x 280, the detector provides intuitive and convenient readings of HCHO, TVOC, CO2, temperature, and humidity. High-Precision Semiconductor Sensors: Equipped with high-precision semiconductor sensors, the detector accurately identifies and captures different pollutants in gases, ensuring more accurate real-time measurements of HCHO, TVOC, and CO2 concentrations. Superior Temperature and Humidity Sensors: The detector uses superior temperature and humidity sensors with fine interference resistance, ensuring the accuracy of each indicator measurement and stable performance with low power consumption. Divide Function Air Quality Level: The detector has an air quality level division function, with 4 different font colors corresponding to different air quality