1. LCD 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. 2. The product is 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, also provides fine heat dissipation effect. 3. 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. 4. The CO2 analyzer uses a semiconductor TVOC sensor to calculate the carbon dioxide concentration, with stable performance, low consumption and long service life. 5. 1200mAh capacity battery for long working time, Type-C charging interface, easy charging. 6. We all know that air is an indispensable part of lives. The quality of air is affecting body and mind, the air is colorless and tasteless, ' measure it with the eyes. At this time, we need an air tester to help to monitor the air quality. CO2 measuring range: 400-5000ppm Temperature measuring range: 0-50 Humidity measuring range: 0%-99%RH Battery: 3.7V, 1200mAh Sensor: semiconductor TVOC sensor Item size: 90 x 70 x 35mm / 3.5 x 2.8 x 1.4in Material:ABS colour:White Package Contents: 1 x Air Quality Analyzer 1 x Charging Cable Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.