Features: With Infrared sensor, professional detector, quick response to air quality change. Displaying in 3 ways, vertical/horizontal display, pressing the power buttion 3 times continuously, 8 data will show in the full screen. Accurate detect air of Carbon Dioxide(CO2), Formaldehyde(HCHO), Volatile Organic Compound(TVOC), Temperature, Humidity, PM2.5/PM1.0/PM10. You can directly to know the overall environment quality and track on each gas mean value to know what gas in air is unsafe and take accordingly actions. It's easy to carry the intelligent air quality monitor that can help us detect the gas air pollution in household, kitchen, bedroom, office, school, car, hotel, travel, camping, party etc. Specifications: Material: ABS Size: approx 89x70x35mm/3.5x2.76x1.4in Measuring range: 400-5000PPM Accuracy: 10PPM Color: black/white Package Includes: 1x Air Quality Monitor note: Please allow 1-3cm error due to manual measurement. pls 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.