Various Detectable Gases - The indoor air quality monitor with built-in electrochemical sensors can accurately detect carbon dioxide (CO2), (HCHO), volatile organic compounds (TVOC), and particulate matter (PM2.5/PM10) in the air. These readings involve the detection of toluene, harmful chemicals and pollutants in the air. New Design - The unique mold designed air quality monitor with LCD color digital display can provide an average value for each gas, because long-term monitoring, real-time data is unstable. Easy Operation - This air monitor is easy to operate, and alarm sounds. At the same time, you can set the standard value of . If the density is higher than the standard value, the device will alarm. Portable 1200mAh Rechargeable Battery - It adopts 1200mAh rechargeable battery, packaged with a USB cable. Wide Application - Widely used in homes, offices, enterprises, governments, schools and automobiles. Detect and monitor air problems at any time to ensure the health of family members or employees. Specification: Size: Approx.118x70x34mm/4.64x2.75x1.33inch Material: ABS Plastic Color: Black Power Supply: Built-in Rechargeable Battery Battery Capacity: 1200mAh Power: 3.7V Charging Time: 4h Digital LCD Color Display Detectable Substance: HCHO TVOC PM2.5 PM10 Package Includes: 1x Air Quality Monitor 1x Manual 1x USB Cable Note: 1.Please allow 1~3 cm error due to manual measurement, thanks. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, thank you.