1Portable and Easy to Use: The palm sized portable CO2 detector is easy to carry and can detect gas quality in bedrooms, living rooms, kitchens, offices, cars, schools, hotels, camping and other environments. 2Accurate Air Quality Tracking: The CO2 detector features advanced built in scatter detection sensors designed to accurately track air quality, including CO2, temperature, and humidity. 3Electrochemical Detection Module: The electrochemical detection module with special quality is adopted, which has good accuracy, stable performance, strong anti interference ability, low consumption and long life of the box body. 4Different Colors Flash: Large screen to show different air quality with different font colors. 0999ppm: green flash, 10001999ppm: yellow flash, 20002900ppm: orange flash, 30003999ppm: red flash, 4000ppm: above four colors flash. 5Efficient Heat Dissipation: Hundreds of vents in the rear not only speed up the convection between the air and the machine, enabling efficient detection, but also provide excellent heat dissipation.1 x CO2 Detector1 x Manual 1 x USB Cable