Features: 1. Fast update speed: large screen design, clear and easy to read. The real-time update time of carbon dioxide only takes 1 second. 2. Accurate measurement: high-performance chip, accurate measurement and better performance. It uses more professional infrared optics to detect carbon dioxide accurately and quickly. 3. Functions: carbon dioxide detection, risk assessment, temperature and humidity detection, intelligent alarm system, gas identification algorithm, multiple anti-interference, air convection technology, greenhouse compensation calibration. 1. This product can measure the concentration of carbon dioxide. 2. It can be used for agricultural planting, greenhouse vegetables, production warehouses, material processing, home interior decoration, etc. Specifications: Size: 90*70*40mm Color: black, white (optional) Refresh time: 1s CO2 measurement range: 400-5000PPM Charging: USB lithium battery Measurement object: carbon dioxide Display: Color screen TFT Material: PVC + ABS Temperature accuracy :0.3 Humidity accuracy: 3% Accuracy: 1PPM Packing list: 1 carbon dioxide detector 1 instruction manual 1 data line