CO2 Air Quality Monitor Gas Tester Detector Analyzer Carbon Dioxide Meter with Temperature Humidity Display Features: Made of fine quality material, practical, easy to operate, and use has a long service life. Large screen design, clear and easy to see. Carbon dioxide 1s/for time real-time refresh. A high-performance chip is accurate and more outstanding. Functions: carbon dioxide detection, hazard assessment, temperature, and humidity detection, intelligent alarm system, gas recognition algorithm, multiple anti-interference, air convection technology, greenhouse compensation calibration. Application areas: agricultural planting, greenhouse vegetables, production warehouse, for raw material processing, home interior, etc. Using more professional infrared optical principles to accurately and quickly detect carbon dioxide. Specifications: Material: PVC+ABS Color: black, white (optional) Battery: 1 * lithium battery, 1200mAh (included) CO2 measurement range: 400-5000PPM Accuracy: 1PPM Sensor: CO2 sensor, temperature and humidity sensor (digital SHT20) Temperature accuracy: 0.3 Humidity accuracy: 3% Package size: 90 * 70 * 40mm / 3.6 * 2.8 * 1.7in How to use: One-button start, press the button for 3 seconds to turn on the machine and start testing, no calibration is required. Press the button for 3 seconds, the machine shuts down. Package includes: 1 * CO2 Detector 1 * USB Cable 1 * User Manual