Feature:1. Air Quality Monitor: There are 2 models for option. TC-8100 features 3 channels to detect the number of 0.3um, 2.5um particle size dust, the concentration of PM2.5 and PM10, AQI Grade, temperature and humidity. TC-8200 features 6 channels to detect the number of 0.3um, 0.5um, 1.0um, 2.5um, 5.0um, 10um particle size dust, the concentration of PM2.5 and PM10, and it can detect the class of Class 100 clean room and below clean room, temperature, humidity and AQI Grade.2. 3.2\" TFT Color Screen \u0026 Comfortable Buttons: Large color screen with backlight can enhance reading experience, and the brightness can be easily adjusted. It also display real-time date and time. / switchable. Auto shutdown to save battery, more power-saving. With comfortable operating buttons, easy to use.3. Data Record, Curve Graph \u0026 PM2.5 Alarm: It has 999 groups of data records, and you can view the data curve conveniently by pressing the graph button once. With PM2.5 alarm function, turn on/ off alarm buzzer and set the alarm value easily.4. Dual Power Supply: Rechargeable lithium battery or USB cable powered. Built in 2200mAh lithium battery, has about 9 hours long working time, easy to be charged via USB interface. And the battery cover is easy to be removed and installed, making it convenient to replace lithium battery.5. Tripod Support \u0026 Wide Application: Comes with a tripod for supporting, more convenient to use. Applied to clean room inspection; industrial production of electronics, optics, chemicals, food, medicine and health, biological products, aerospace, etc.; filter seal inspection; particle pollution source detection.Specification:The product adopts the principle of scattering, can monitor air quality, temperature, humidity. It has 999 groups of data records, can view the data curve, with 3.2 inch TFT full color display, automatic measurement, real-time date and time, rechargeable battery or separate external USB power supply, stable data, etc.Specifications:Color: Grey and RedModel: TC-8200 (Grey and Red)Material: ABSConcentration Resolution: 1g/mFlow: 1 liter/min (2.83L=1L*2.83)Response Time: about 1sBoot Stabilization Time: about 10sTemperature Measurement: -10~60 Range, 2 Accuracy, 0.01 ResolutionHumidity Measurement: 0 to one hundred percent Range, 3% Accuracy; 0.01% ResolutionBuilt in Battery: 3.7V 2000mAh BatteryCharging Voltage: 5V/ USBItem Size: 222 * 80 * 46mm / 8.74 * 3.15 * 1.81inItem Weight: 311g / 10.98ozPackage Size: 26 * 21 * 8cm / 10.24 * 8.27 * 3.15inPackage Weight: 738g / 1.63lbsTC-81003 channel Particle Size: 0.3m, 2.5m, 10mPM2.5 Range: 0~1000g/mPM2.5 Precise: 12g/m.Package List:1 * Dust Particle Counter1 * USB Cable1 * Tripod1 * User Manual (English)