The V-Series Portable Air Quality Tester is a portable handheld device with a compact main unit that detects particulate matter, CO2, VOC, formaldehyde and other contaminants. - The particle uses a high-precision laser sensor to quickly and accurately detect pm1.0, pm2.5, and pm10 concentrations, and can draw a 24-hour pollution curve. -CO2 non-divergent infrared detection technology, automatic baseline correction, data accuracy and stability. - Formaldehyde uses a high-precision electrochemical sensor to accurately resolve 0.01 mg / m3 of free formaldehyde molecules. The BR - Smart Series is a real-time air quality monitoring instrument for detecting the air quality of indoor environments. - Smart monitors use high-precision sensors to directly convert pollutant concentrations in the air into intuitive data to provide air quality monitoring information to protect your home health. -The advanced core technology uses high-precision imported sensors, and the sensor drift error is the lowest in the industry. The patent algorithm can finally distinguish the virus-level particles accurately. -SMART series can detect various pollutants, including PM2.5, PM10, formaldehyde, VOCS and so on. - More professional human-machine interface interaction, accurate display of data curve, external TF memory function, maximum support for 8G TF card, more powerful storage function, can clearly monitor air quality.