Versatile and Scientific - This indoor air quality monitor accurately measures temperature (Celsius/Fahrenheit), humidity levels, and multiple air quality measurements, including concentrations of formaldehyde, natural and synthetic volatile organic compounds (TVOCs) that cause most odors, and fine dust substances (PM2.5/PM1.0/PM10) that penetrate deep into the airways and reach the alveoli. Portable Testing - spot checks or leave the unit on to continuously monitor indoor air quality. The built-in stand allows the air monitor to be left unattended anywhere. This easy-to-carry device can be used to monitor air quality , in the car and in hotel rooms. A lithium battery provides portable power when 5V -USB charging is . Information is displayed on a clear 2.8inch 320 x 240 pixel colour LCD screen. Advanced Sensor - This air quality monitor has a built-in fan that quickly draws in ambient air for real-time measurements. It incorporates a laser sensor to measure dust particle levels and has a second solid state electrochemical sensor to measure levels of formaldehyde and natural/synthetic organic compounds. The air monitor can also be automatically calibrated in air. Color: White Material: ABS Package Contents: 1X Air Quality Monitor 1X USB charging cable 1X manual 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.