1. Hundreds of ventilation holes in the rear not only accelerate the convection between the air and the machine, thus realizing effective detection, but also provide a good heat dissipation effect. 2. The electrochemical detection module of good quality has good accuracy, stable performance, strong anti-interference ability, low consumption and long cabinet life. 3.Good selectivity, not easy to be affected by harmful gases and poisoning aging, fast response speed and good stability, high signal-to-noise ratio can be accurately detected. 4. For everyone, It39;s necessary to know the air quality of the place where you live. 5. It39;s easy to carry the intelligent air quality monitor that can help us detect the gas air pollution in household, kitchen, bedroom, office, school, car, hotel, travel. Notice: *Actual color may be slightly different from the image due to different monitor and light effect *Please allow 1-3cm deviation due to manual measurement Description: Size: 90*70*35mm Package List: 1 set x CO2 Meter