Features: Equipped with high-precisions sensors, the o3 concentration detection is accurate to 0.01ppm. Effectively solve users' confusion about air quality, suitable for home, office, and industrial environment, providing scientific basis for healthy livings. The lightweight body weighs only 300 grams, making it easy to carry around. No need for complex installation,suitable for users who need frequent mobile detection, such as environmental workers and indoor air quality monitors. The led screen displays data on o3, dust, and other substances. Help users quickly understand the surrounding air conditions, especially suitable for air quality monitoring in public place such as schools and hospitals. Equipped with a rechargeable battery, it can last for 12 hours on a single charge. Meet the long-time monitoring needs, especially suitable for outdoor activity or long-time air quality research projects. Adopting ABS engineering plastic shell, the impact resistance is three times higher than ordinary plastic. Ensure that the equipment can still operate normally in various harsh environment and is suitable for use in high-risk areas such as construction sites or plant. Specifications: Material: ABS PM 2.5: 0-999ug O3: 0.00-50.000ppm TVOC: 0.001-9.999Mg Package Includes: 1Piece o3 Meter 1Piece USB Cable 1Piece User Manual note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.