The Air Quality Tester is widely used in homes, offices, enterprises, governments, schools etc. The display of Air Quality Tester is equipped with a 2.8-inch LCD display, which directly and clearly displays each piece of air data ( or and ), while providing average value, real-time value, and environmental recommendations to perfectly display air quality. The easy-to-read numbers and the support of the alarm sound will let you know if your air is unsafe. -type Dust Tester. Built-in 1200 mAn rechargeable battery is included. A USB cable, standby time can last 4-6 hours. The Air Quality Test Formaldehyde Detector with built-in electric sensors can accurately detect carbon dioxide (CO2), formaldehyde (HCHO), volatile 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. Formaldehyde Detector. Widely used in homes, offices, enterprises, governments, schools and automobiles. Detect air problems at any time to the health of family members or employees. mold designed Air Pollution Meter with LCD color digital display can an average value for each , because long-term real-time data is unstable. Specification Air quality test formaldehyde detector Detection error: Less than 15 percent 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 Celsius Humidity measurement range: 20-90 percent RH Battery: 1200mAh lithium battery Standby time: about 240-360 minutes Charging time: about 4 hours Life time: about 2 hours USB interface: Type-C interface Input voltage: 5V or 1A Working environment: 5-40 Celsius, Less than 90 percent RH Colour:Black orange Material:plastic Package Contents: 1 x Air Quality Tester 1 x USB Charging Cable 1 x English manual Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is 1-3cm.