Feature:1. Temperature difference compensation calibration technology, judge the ambient temperature data, automatic calibration test results.2. You can measure CO2 levels, care about your family\u0027s health.3. Locate the source of the contamination and test it more accurately.4. It can be connected to mobile power to check the sealing space.5. Long-term record, tracking formaldehyde /TVOC concentration trend.6. It can be used in greenhouse plantation, farm indoor air detection, household air detection and so on.Specification: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 5VConnection mode: BT4.0TVOC detection ranges: temperature 5-35°C, 0~9.999mg/m3Detection ranges of HCOC: Temperature 5-35°C, 0~9.999mg/m3CO2 detection ranges: temperature 5-35°C, 400-2000ppmTemperature detection ranges: -10~50°CItem size: 75 * 75 * 50mm / 3.0 * 3.0 * 2.0inItem weight: 74g / 2.6ouncePackage size: 116 * 95 * 56mm / 4.6 * 3.7 * 2.2inPackage weight: 110g / 3.9ouncePacking List:1 * Air Quality TesterPackage List:1 * Air Quality Tester