Indoor Portable CO2 Detector Multifunctional Thermohygrometer Home Digital Air Detector Intelligent Air Quality Analyzer Household Air Pollution Monitor Features: LCD large screen different font colors display different air quality green 400-799ppm yellow 800-1199ppm orange 1200-1599ppm red 1600-1999ppm 2000ppm above four colors flash at the same time. The product is compact in size and easy to carry. The ventilation holes in the rear not only accelerate the convection between the air and the machine so as to achieve effective detection but also provides fine heat dissipation effect. The product does not need calibration startup can be tested accurate detection of carbon dioxide used in greenhouse farming agricultural production production warehouse laboratory family etc. Widely used and practical used for epidemic preventions and control to detect the CO2 concentration in the population so as to control the number of people and avoids the risk of cross-infection. 1200mAh large capacity battery for long working time Type-C charging interface easy charging. Specifications: Color: black white (optional) CO2 measuring : 400-5000ppm Temperature measuring : 0-50℃ Humidity measuring : 0％-99％RH Battery: 3.7V 1200mAh Item size: 90 * 70 * 35mm / 3.5 * 2.8 * 1.4in Item weight: 117g / 4.1ounce Package size: 140 * 125 * 41mm / 5.5 * 4.9 * 1.6in Package weight: 173g / 6.1ounce Packing List: 1 * Air Quality Analyzer 1 * USB Cable 1 * User Manual