Description Type 2 This is a kind of fine quality air quality detector, which is adopt profeional electrochemical sensing module, high accuracy, stable performance, antijamming ability, low consumption and can provides long service time. Accurately detect CO2. Large display, you can see the electricity quantity, CO2 value, TVOC value, HCHO value, temperature, and humidity clearly. You can have a try. Features: Adopts digital temperature and humidity sensor, high accuracy, stable performance, antijamming ability, low consumption and can provides long service time. Large LCD display, you can see the electricity quantity, CO2 value, TVOC value, HCHO value, temperature, and humidity clearly. and switchable, and the alarm sound can be on or off according to your demands. Equipped with environmental quality judgment function, it will display appropriate level according to measuring value. Built-in 1800mAh capacity lithium battery, easy to charge it with USB cable. When the battery is too low, the battery frame flashes to remind you to recharge it. Specifications: Name: Air Quality Meter Material: plastics Display: LCD display Battery: 1 * built-in lithium battery, 3.7V, 1800mAh (included) CO2 measuring-range350ppm-2000ppm TVOC measuring-range0.000 mg/m3;-2.000 mg/m3; HCHO measuring-range0.000 mg/m3;-1.000 mg/m3; Temperature measuring-range: 0-90.0(32-194), 1/1 Item size: 176 * 73 * 29mm / 6.93 * 2.87 * 1.14in Item weight: 222g / 7.83ounce Package size: 234 * 180 * 47mm / 9.21 * 7.09 * 1.85in Package weight: 461g / 1.02lb Packing List: 1 * Air Quality Meter 1 * USB Cable Type 3 We all know that air is an indispensable part of our lives. The quality of air is affecting our body and mind, but the air is colorle and tastele, we cant measure it with the eyes. At this time, we need an air tester to help to monitor the air quality. 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 diipation 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 cro-infection. 1200mAh large capacity battery for long working time, Type-C charging interface, easy charging. Specifications: Color: black, white (optional) CO2 measuring range: 400-5000ppm Temperature measuring range: 0-50 Humidity measuring range: 0-99RH 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 Type 4 This is a air detector that can help you check the air condition. Its a nice helper for wine brewing, greenhouse fruit and vegetable planting,warehouse CO2 detection,etc. Features: Equipped with temperature and humidity sensors. Quick accurate detection. It displays the current CO2 data, as well as the temperature and humidity data. The colored circle will change according to the CO2 conten. Small size and light. Convenient to carry. Simple operation. No need to calibrate after starting up, work and detect automatically. 2.8 inch LCD screen + backlight display. It can inform you the air condition with accurate datas. 300~420 mins long standby time. Can be used at various occasions such as agricultural cultivation, greenhouse vegetables, production warehouses,raw materials proceing, home, educational institutions, vip sports, office, etc. Specifications: Item Color: Black,white (optional) Battery: Lithium-battery 1200mAH Charging Mode: USB 500mA Type C Interface CO2 Detection Range:400~5000 PPM CO2 Detection Sensitivity: 1 PPM Applicable Temperataure: -1~70 Package Size:140*125*42mm/5.5*4.9*1.7in Package Weight:165g/5.8oz Packing List: 1* Air Detector 1* Instruction 1*USB Cable Shipping: 1.We guarantee to ship goods out within 24-72 hour after