- 1.6-in-1 detection function: This multifunctional carbon dioxide meter monitors carbon dioxide values as well as PM5, HCHO and TVOC concentrations, temperature and airiness to ensure a safe living space. - 2. Reliable sensor accuracy: Advanced sensor technology provides consistent performance and accurate data acquisition, so you can trust the information provided by this device. - 3. Easy visualisation with LED display: The four-colour LED screen makes it easier to assess the air quality status at a glance while improving the user experience through clear visual displays. - 4. Instant functionality: Get instant notifications from visible colour changes when air quality changes. With this function, you can take measures to improve health if necessary. Use scenarios - Home monitoring: Track CO2, PM5, HCHO and TVOC levels in living rooms or bedrooms to maintain a healthier indoor environment for children and adults. - Office or classroom use: Monitor air quality during occupancy to support comfort, focus and well-being. - Renovation or new space: After painting or furnishing, track HCHO and TVOC emissions to ensure safer air before prolonged exposure.