Features： 1、Three Functions: Our carbon dioxide detector sets carbon dioxide detection, temperature detection, humidity detection three functions in one, so that you can intuitively understand the air quality of living space. 2、Infrared Sensor: Using infrared sensor to detect carbon dioxide, the carbon dioxide detector has faster speed, good accuracy, stable performance, strong anti interference ability, low consumption, long service life. 3、Large Screen: The detector is equipped with a large screen, different font colors show different air quality, convenient for you to check the air quality at any time. 4、Ventilation Hole: The left and right ventilation holes not only accelerate the convection between the air and the machine, so as to realize effective detection, but also provide a good heat dissipation effect. 5、Application: Our carbon dioxide detector is applicable to a wide range of places, schools, hospitals, restaurants, shopping malls, offices, home and so on. Specification： Item Type: Carbon Dioxide Detector Material: ABS, electronic components Weight: Approx. 192g/6.77oz Size: 9x7x4cm/3.54x2.76x1.57in Carbon Dioxide Detection Range: 400-5000ppm Accuracy: 1ppm Temperature Measurement Range: 0-50℃, Accuracy: ±1℃ Humidity Measurement Range: 0%-99%RH, Accuracy: ±2%RH Battery: Built in rechargeable lithium battery, Model: 18650, Capacity: 1200mAh, shipped with built in battery Package List： 1 x Carbon Dioxide Detector 1 x Cable 1 x Description