6 In 1 Air Quality Tester: Come and try this new type multifunctional air quality detector, compared with other air quality detectors, this detector can testing PM2.5, PM10, HCHO, TVOC, CO and CO2 at the same time. Display Screen: This air quality monitor with a display screen to see the detecting data more clearly, you can the results . Portable Size: This monitor is small in size and you can use it on your desk without taking up too much desk space, also easy to carry. Wide Applications: This CO2 monitor can be used in your home, office, , hotel and other . Built-in Multiple Sensors: This air quality monitor using infrared detection technology, -detection technology and electrochemical detection technology to show you the accurate data. Four Color Alarm: There are four different color to show the different qualities of the air being monitored: The green means the air quality is and the colors ranging from yellow to orange to red mean worse air quality. Temperature Units Conversion: The temperature units can be switch between degrees Celsius and Fahrenheit and when the monitoring data exceeds the standard, sound will be emitted to indicate. PM2.5 detecting ranges: 0-999ug/m PM10 detecting ranges: 0-999ug/m HCHO detecting ranges: 0-9.999mg/m TVOC detecting ranges: 0-9.999mg/m CO detecting ranges: 0-1000PPM CO2 detecting ranges: 400-5000PPM Recharging : USB 500mA Type-c interface Battery: 1 x lithium battery, 1200mAh (included) Item size: 90 x 70 x 35mm / 3.5 x 2.8 x 1.4in Colour:black Material:ABS Package Contents: 2 x Air Quality Monitor 2 x Charging Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.