Large screen liquid crystal display, different font colors show different air quality, green 400-799ppm, yellow 800-1199ppm, orange 1200-1599ppm, red 1600-1999ppm and 2000ppm flash at the same time.The product is small and easy to transport.The rear vent not only accelerates the convection between the air and the machine to achieve effective detection, but also has good heat dissipation effect.This product needs no calibration, can be tested and started, and the carbon dioxide detection is accurate. It is suitable for agricultural production greenhouses, warehouses, laboratories, families, etc.It is widely used and practical for epidemic prevention, detecting the CO2 concentration in the population, controlling the number of people and avoiding the risk of cross infection.1200 MAH high-capacity battery, extended working time, C-type charging interface, convenient charging.Color: whiteWe all know that air is an indispensable part of our life.Air quality affects our body and mind, but air is colorless and tasteless, which we can't measure with our eyes.Now, we need an air tester to help monitor air quality.characteristic:The product is small and easy to transport.The rear vent not only accelerates the convection between the air and the machine to achieve effective detection, but also has good heat dissipation effect.This product needs no calibration, can be tested and started, and the carbon dioxide detection is accurate. It is suitable for agricultural production greenhouses, warehouses, laboratories, families, etc.It is widely used and practical for epidemic prevention, detecting the CO2 concentration in the population, controlling the number of people and avoiding the risk of cross infection.1200 MAH high-capacity battery, extended working time, C-type charging interface, convenient charging.Specifications:Color: black, white (optional)CO2 measurement range: 400-5000ppmTemperature measurement range: 0-50 Humidity measurement range: 0% - 99% RHBattery: 3.7 V, 1200 MahItem size: 90 * 70 * 35mm / 3.5 * 2.8 * 1.4 inchesItem weight: 117 g / 4.1 ozPackage size: 140 * 125 * 41 mm / 5.5 * 4.9 * 1.6 inchesPackage weight: 173 g / 6.1 ozPacking list:1 * air quality analyzer1 * USB cable1 * user manual