Description This is a kind of quality air quality detector, which uses NDIR s-ensor, with high accuracy, stable performance, can accurately detect carbon dioxide, TVOC and HCHO value. 3.5inch large color LED display, you can see the carbon dioxide concentration, temperature and humidity, electric quantity, time and data clearly. Widely applications: agricultural planting, greenhouse vegetables, production warehouse, material proceing, home interior, etc.. You can have a try. Features: Uses NDIR s-ensor, with high accuracy, stable performance, can accurately detect carbon dioxide value. Adopts air convection design, which can provides more accurate detection results, and the detection-range is from 400ppm to 5000ppm. 3.5inch large color LED display, you can see the carbon dioxide concentration, temperature and humidity, electric quantity, time and data clearly. Strong anti-interference ability, low consumption and long service life. The product does not need calibration, it can be tested after booting, and it can accurately detect carbon dioxide. Hundreds of ventilation holes reserved on the housing not only accelerate the convection between the air and the machine, thereby realizing effective detection, but also provide a fine heat diipation effect. Widely applications: agricultural planting, greenhouse vegetables, production warehouse, material proceing, home interior, etc.. Specifications: Name: Air Quality Detector Screen type: 3.5 inch LED Material: ABS Battery: 1 * 3.7V, 2000mAh battery (included) Detection-range: 400-5000ppm TVOC detection-range: 1PPM Voltage: DC5V/1A Recharging interface: USB Working voltage: -10 to 50 Working humidity: 0-95%RH Item size: 136.5 * 78 * 86mm / 5.37 * 3.07 3.39in Item weight: 220g / 7.76ounce Package size: 150 * 100 * 100mm / 5..91 * 3.94 * 3.94in Package weight: 245g / 8.64ounce Packing List: 1 * Air Quality Detector 1 * User Manual