Features: Using ARM chip, most of the world's samrtphone processors are produced by ARM with 32-bit high-speed processing performances, which greatly increases the computing speed,more accurate detection and smooth. The hazard degree of harmful gases such as formaldehyde and TVOC is not for a static trackings in order to systematically grasp the for health of the Environment. The Air Quality Tester is widely used in homes, offices, enterprises, governments, schools. The Air Quality Test Formaldehyde Detectors with built-in electric chemicals sensors can accurately detect carbon dioxide, formaldehyde (HCHO), volatile organic compounds (TVOC) and particulate matter (PM2.5/PM10) in the air. These readings involves the detection of toluenes, harmful chemicals and pollutants in the air. Colored screen, intelligent control , stable, quick, you can get the precise figure easily. Specifications: Material: ABS Size: 1.7x2.7x5.9 inch Formaldehyde detection ranging: 0.000-1.999mg TVOC detection ranging: 0.000-1.999mg1.0/PM2.5/PM10 detection ranging: 0-999ug Temperature measurement ranging: 0-50℃ Humidity measurement ranging: 20~90%RH Charging time: about 4 hours Life time: abou USB interfaces: TypeC interfaces Input voltage: 5V Working environment: 5-40℃, <90% 2 hours Package Includes: 1x Formaldehyde Detectors 1x 1200mAh lithium battery 1x USB Charging Cable note: Please allow 1-3cm error due to manual measurement. please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.