6 in 1 Air Quality Monitor:This air quality monitor features a large screen that allows you to see your test data more clearly and get results easilywhich can detect PM2.5, PM10, HCHO, TVOC, CO and CO2 compared to other air quality monitors at the same time. Portable Size: This monitor is small in size, you can use it on your desk without taking up too much desk space, and it is easy to carry. Wide range of applications: This CO2 monitor can be used in your home, office, station, hotel and more. Four-color alarm: There are four different colors to show the different quality of the air being monitored: green for good air quality, and colors from yellow to orange to red for poor air quality. Temperature unit conversion: The temperature unit can be switched between Celsius and Fahrenheit. When the monitoring data exceeds the standard, a sound prompt will be issued. Specification: Material: ABS Color: black, white (optional) PM2.5 detection range: 0-999ug/m³ PM10 detection range: 0-999ug/m³ HCHO detection range: 0-9.999mg/m³ HCHO detection range: 0-9.999 mg/ m³ TVOC: 0-9.999mg/m³ CO detection range: 0-1000ppm CO2 detection range: 400-5000PPM charging Mode: 500mA type-c USB interface Battery: 1*Lithium battery, 1200mAh (included) item size: 90*70*35mm/3.5*2.8inch Packing Weight: 200g/7.1oz Packing List: 1 * Air Quality Monitor Package includes: 1 * Air Detector 1 * USB cable