Air quality detectors are widely used in homes, offices, businesses, governments, schools, etc. The display screen of the air quality tester is equipped with a 2.8-inch LCD screen, which directly and clearly displays each air data, and at the same time provides average values, real-time values and environmental suggestions, perfectly displaying air quality. Easy-to-read numbers and an audible alarm will let you know if your air is unsafe or not. Includes built-in 1200 mA rechargeable battery. With a USB cable, the standby time can last for 4-6 hours. The air quality detection formaldehyde detector with built-in electrochemical sensor can accurately detect carbon dioxide (CO2), formaldehyde (HCHO), volatile compounds (TVOC) and particulate matter (PM2.5/PM10) in the air. Widely used in home, office, business, government, school and car etc. Detect air problems at any time, which is related to the health of family members or employees. The designed air pollution meter has a liquid crystal color digital display, which can average each value, because the long-term real-time data is not stable., Manufacturer: XZXXZSZ