The air quality monitor uses the scattering principle to monitor air quality, temperature, humidity and AQI level. It has multiple functions and specifications: Features: Data recording and analysis: Record 999 sets of data, and you can easily view the data curve. Large color screen: Equipped with a 3.2-inch TFT full-color display with backlight for enhanced readability. Real-time date and time display. Dual power supply: Can be powered by a rechargeable lithium battery (built-in 2000mAh) or an external USB power supply. Two models are available: TC-8100: 3 channels, detects dust with 0.3um and 2.5um particle sizes, PM2.5 and PM10 concentrations, AQI levels, temperature and humidity. TC-8200: 6 channels, detects 0.3um, 0.5um, 1.0um, 2.5um, 5.0um, 10um particle size dust, PM2.5, PM10 concentration, clean room class 100 and below, temperature, humidity, AQI level. PM2.5 alarm function: PM2.5 level alarm value can be set. Tripod: Comes with a tripod for easy setup and use. Specifications: Material: ABS Concentration resolution: 1g/ml Flow rate: 1 liter/minute Response time: about 1 second Temperature measurement range: -10~60> Humidity measurement range: 0~ Built-in battery: 3.7V 2000mAh lithium battery Charging voltage: 5V/USB Product size: 222*80*46mm Product weight: 311g Packing list: 1 * Dust particle counter 1 * USB cable 1 * Tripod 1 * User Manual (English) The air quality monitor is suitable for a variety of applications, including clean room inspection, industrial production, filter seal inspection and particle pollution source detection.