Features: This air quality tester makes it easier to monitor or spot check the air quality at home, in the car, in hotel rooms or anywhere you live. Can accurately test indoor pollution of Formaldehyde (HCHO), Total Volatile Organic Compound (TVOC) and Air Quality Index. Semiconductor air quality sensor technology. diagonal backlit LCD screen. With 4 grades air quality display, comfort display. Suitable for houses, for cars, offices and other sealed spaces; This compact device will save you for time and energy especially when there are a lot of places waiting be tested. Specifications: Material: ABS Size: 210x80x60mm/8.27x3.15x2.36in Accuracy: 0.01 Measuring Range: 0.000 ~ 2.888 mg/m³ (Formaldehyde) ,0-9.999mg/m³(TVOC) 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.