The air quality monitor is equipped with large colorful LCD screen, clear to read even in dark environment. Accurately measure the data of HCHO, CO2, TVOC, temperature and humidity, low error, easily get to know the air quality around you. With built-in 1200mAh high capacity rechargeable battery to offer a longer playing time, USB rechargeable, you can charge the air quality monitor via power bank, power adapter, computer, PC, laptop. Having a healthier home lifestyle, the air quality monitor automatically and accurately detects CO2, formaldehyde and TVOC concentration in the air. Widely used in home, car, hotel, apartment, office, cafe, library, outdoors and more. Specifications: Material: ABS Size: 90x70x35mm/3.5x2.76x1.38in White/Black Color: White/Black 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. Package Includes: 1X Air Quality Monitor