Features: 1. Compact in size and portable, easy to carry. 2. Equipped with a quality intelligent chip for fast response and accurate CO2 measurement in the air, ensuring high performance and accuracy. 3. Utilizes a high-accuracy semiconductor sensor with precise temperature and humidity detection, excellent interference resistance, stable performance, and low power consumption. 4. Digital display shows battery level, CO2 value, TVOC value, HCHO value, temperature, and humidity clearly. 5. Multifunctional design with real-time detection, automatic data refresh, and self-calibration functions. Specifications: Name: Air Quality Detector Battery: 1 x 18650 battery (not included) Display: Digital display Interface: Type-C 5V, 1A CO2 Measurement Range: 400–5000 ppm Temperature Measurement Range: 0 to 50°C (32 to 122°F) Humidity Measurement Range: 0–100% RH Includes air quality level indication with four levels to help understand current air conditions. Multi-channel air convection design enables efficient detection through enhanced air flow and provides effective heat dissipation. Applications: Suitable for agricultural planting, greenhouses, warehouses, material processing, offices, and other indoor environments. Material: Plastic Color: White Package Contents: 1 x Air Quality Detector 1 x User Manual in English Note: The package includes only the items listed above. Other accessories are not included. Note: Lighting effects and display settings may cause slight color variations between the image and the actual product. Measurement error allowed within +/- 1–3 cm.