Features: Using ARM chips, most of the world's samrtphone processors are produced by ARM with 32-bit high-speed processing performance, which greatly increases the computing speed,more accurate detection and smooth. The hazard degree of harmful gases such as formaldehyde and TVOC isn'for t a static tracking in order to systematically grasp the for health of the Environment. The Air Quality Tester is widely used in homes, offices, enterprises, governments, schools etc. The Air Quality Test Formaldehyde Detector with built-in electric chemical sensors can accurately detect carbon dioxide (CO2), formaldehyde (HCHO), volatile organic compounds (TVOC) and particulate matter (PM2.5 or PM10) in the air. These readings involve the detection of toluene, harmful chemicals and pollutants in the air. Colored screen, intelligent control , stable, quick, you can get the precise figure easily. Specifications: Material: ABS Platic Size: 1.7x2.7x5.9 inch Formaldehyde detection range: 0.000-1.999mg or m TVOC detection range: 0.000-1.999mg or m PM1.0 or PM2.5 or PM10 detection range: 0-999ug or m Temperature measurement range: 0-50 Humidity measurement range: 20-90 percent RH Charging time: about 4 hours Life time: abouUSB interface: Type-C interface Input voltage: 5V or 1A Working environment: 5-40