Carbon Dioxide CO2 Detector Air Quality Tester Formaldehyde Detector High Sensitive Poisoning Detector Indoor Formaldehyde Testing Machine New houses that have just been renovated, furniture just bought, and new car purchased will contain formaldehyde, which can cause illness. With this formaldehyde detector, you can monitor air quality at any time. Features: Temperature difference compensation calibration technology, judge the ambient temperature data, automatic calibration test results. You can measure CO2 levels, care about your family's health. Locate the source of the contamination and test it more accurately. It can be connected to mobiles powers to check the sealing space. Long-term record, tracking formaldehyde /TVOC concentration trend. It can be used in greenhouse plantation, farm indoor air detection, household air detection and so on. Specifications: Power supply: USB 5V Connection mode: BT4.0 TVOC detection ranges: temperature 5-35°C, 0~9.999mg/m3 Detection ranges of HCOC: Temperature 5-35°C, 0~9.999mg/m3 CO2 detection ranges: temperature 5-35°C, 400-2000ppm Temperature detection ranges: -10~50°C Item size: 75 * 75 * 50mm / 3.0 * 3.0 * 2.0in Item weight: 74g / 2.6ounce Package size: 116 * 95 * 56mm / 4.6 * 3.7 * 2.2in Package weight: 110g / 3.9ounce Packing List: 1 * Air Quality Tester