1. Compact in size, lightweight and portable, easy to carry around with you. 2. Uses accuracy TVOC sensors for realtime detection with automatic data refresh, suitable for multiple uses. 3. Large LCD display clearly shows battery level, CO2 value, TVOC value, HCHO value, temperature, and humidity. 4. Stable, switchable operation with antijamming capability, low power consumption, and long service life. 5. Air quality level indicator with four color codes, allowing quick and graphic understanding of current conditions. 6. Hundreds of air vents on the outer shell speed up air exchange for effective detection and provide good heat dissipation. 7. Use scenarios Home and apartment environments such as living rooms, bedrooms, and kitchens to monitor and improve indoor air quality. Office, classroom, or other work and study spaces to ensure a safe and comfortable environment. Travel or temporary accommodations (hotels, dorms) to verify air quality and monitor comfort levels.