Feature: 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