Compact in size, lightweight and portable for easy carrying and use anywhere. Adopts accuracy TVOC sensors for realtime detection with automatic data refresh, suitable for multiple uses. Large LCD display clearly shows battery level, CO2 value, TVOC value, HCHO value, temperature and humidity. Switchable with stable detection performance, antijamming capability, low power consumption and long service life. Equipped with an air quality level division function; four colors correspond to different air quality levels for clearer, more graphic understanding of current conditions. Hundreds of air vents on the outer shell speed up air convection for effective detection and provide better heat dissipation. Use scenarios At home: monitor air quality during cooking, renovations, or when sensitive individuals are present to ensure comfortable and safe indoor conditions. In offices or classrooms: maintain healthy air by tracking CO2, VOCs and related parameters during meetings or study sessions. While traveling or staying in hotels or temporary spaces: quickly assess room air quality and detect pollutants to inform ventilation needs.