2.8 color liquid crystal display (LCD), 320x240 pixels. User-adjustable O3 alarm threshold to alert the user of elevated levels. It can be used in the office, indoors and outdoors, and to detect residual ozone after disinfection. Large lithium battery with a capacity of 2000mAh. On-board suction fan ambient air for more accurate real-time results. Vislone Air Quality Monitor helps you maintain a clean, healthy and fresh living environment by scientifically monitoring the air quality in your home. During a global pandemic, we've all learned that the air we breathe can seriously affect our health. It's time we protect our family and loved ones by improving our daily living environment. VISLONE Ozone Meter Detector Air Quality monitors PM2.5, PM10, Particulate, HCHO, TVOC, AQI, Temperature, humidity, in a shorter detection time and gives more accurate results. The compact and lightweight design with industrial-grade drop resistance makes it more durable and easier to transport. The sensor has been standardized with professional laboratory equipment from the factory calibrated to ensure its stability and compatibility out of the box. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.