Specifications Name Air Quality Detector HCHO TVOC TesterColor BlackCharging time Approx 4 hoursStandby time Approx 10 hoursVoltage 5V 1AResolution 0 001mg m3 0 001ppmFormaldehyde detection 0 9 999mg m 0 7 999ppmTVOC detection 0 99 99mg mWorking voltage DC 5V Feature Independent sensor for detecting HCHO TVOC temperature and humidity Sampling by means of natural air flow 24 hour detecting recording the mean Beep when the alarm value is exceeded HD large display screen the data is clear at a glance Easy to carry suitable for testing in various environments such as home office and car Recharged by a UBS cable Package included 1 x Air Quality Tester1 x USB CableDetails Pictures