This is a kind of quality air quality detector, which uses high-precision solid-state sensors, with stable working performance. Large digital display, 3 in 1 design, you can clearly see the carbon dioxide concentration, real-time temperature and humidity data. Wide applications: agricultural planting, greenhouse vegetables, production warehouse, material processing, home interior, etc. You can try. Features: Uses high-precision solid-state sensors, with stable working performance, can accurately detect the value of the carbon dioxide. Adopts air convection design, which can provide more accurate detection results, and the detection ranges are from 400 ppm to 5000 ppm. Large LCD screen, 3 design in 1, you can clearly see the carbon dioxide concentration, real-time temperature and humidity data. 4-color color circle design, different font colors display different air quality , green 0-799 ppm, light green 800-1199 ppm, orange 1200-1599 ppm, red 1600-1999 ppm, 2000 ppm above four colors flash at the same time. Strong anti-interference ability, weak consumption and long life. The product does not need calibration, it can be tested after startup, and it can accurately detect carbon dioxide. Hundreds of ventilation holes Reserved on the case not only accelerate the convection between the air and the machine, thereby realizing effective sensing, but also provide fine heat dissipation effect. Widely applications: agricultural planting, greenhouse vegetables, warehouse ?t production, material processing, home interior, etc. 1200 mAh large capacity battery for long working time, Type-C charging interface, easy charging. Features: Name: Air quality analyzer Color: black, white (optional) Display: LCD + backlight Battery: 1 * 3.7 V, 1200 mAh battery (included) CO2 measuring ranges: 400-5000ppm Resolution?: 1?ppm Temperature measuring ranges: 0-50 Resolution: 1 Humidity measuring ranges: 0-99RH Resolution?: 5?% HR Operating temperature: 0-70 Input voltage: 5?V Charging interface: Type-C Item size: 90 * 70 * 35mm / 3.5 * 2.8 * 1.4inch Item Weight: 117g / 4.1oz Package size: 140 * 125 * 41mm / 5.5 * 4.9 * 1.6inch Package Weight: 173g / 6.1oz Packing List: 1 * Air Quality Analyzer 1 * Type Cable C 1 * user manual