This is a kind of fine quality air quality detector, which is adopt professional electrochemical sensing module, high accuracy, stable performance, antijamming ability, low consumption and can provides long service time. Accurately detect CO2. Large display, you can see the electricity quantity, CO2 value, TVOC value, HCHO value, temperature, and humidity clearly. You can have a try. Specifications: Name: Air Quality Meter Material: plastics Display: LCD display Battery: 1 * built-in lithium battery, 3.7V, 1800mAh (included) CO2 measuring-range #xff1a;350ppm-2000ppm TVOC measuring-range #xff1a;0.000 mg/m-2.000 mg/m HCHO measuring-range #xff1a;0.000 mg/m-1.000 mg/m Temperature measuring-range: 0-90.0(32-194), 1/1 Item size: 176 * 73 * 29mm / 6.93 * 2.87 * 1.14in Item weight: 222g / 7.83ounce Package size: 234 * 180 * 47mm / 9.21 * 7.09 * 1.85in Package weight: 461g / 1.02lb Packing List: 1 * Air Quality Meter 1 * USB Cable