Features:  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.  3.2" TFT Color Screen & 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.  Data Record, Curve Graph & 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.  Dual Power Supply: Rechargeable lithium battery or USB cable powered. Built in 2000mAh 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.  Tripod Support & 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.    Specifications:  Color: Grey & Yellow/ Grey & Red (Optional)  Model: TC-8100 (Grey & Yellow)/ TC-8200 (Grey & Red)  Material: ABS  Concentration Resolution: 1μg/m³  Flow: 1 liter/min (2.83L=1L*2.83)  Response Time: about 1s  Boot Stabilization Time: about 10s  Temperature Measurement: -10~60℃ Range, ±2℃ Accuracy, 0.01℃ Resolution  Humidity Measurement: 0~100% Range, ±3% Accuracy; 0.01% Resolution  Built-in Battery: 3.7V 2000mAh Lithium Battery  Charging Voltage: 5V/ USB  Item Size: 222 * 80 * 46mm / 8.74 * 3.15 * 1.81in  Item Weight: 311g / 10.98oz  Package Size: 26 * 21 * 8cm / 10.24 * 8.27 * 3.15in  Package Weight: 738g / 1.63lbs    --TC-8100  3-channel Particle Size: 0.3μm, 2.5μm, 10μm  PM2.5 Range: 0~1000μg/m³  PM2.5 Precision: ±12μg/m³    --TC-8200  6-channel Particle Size: 0.3μm, 0.5μm, 1.0μm, 2.5μm, 5.0μm, 10μm  PM2.5 Range: 0~1000μg/m³  PM2.5 Precision: ±10μg/m³ (0~100μg/m³), ±10% (100~1000μg/m³)  Number of Particles Output Range: ≤2,000,000 Granule/L  Cleanliness Standard: Meets the ISO 14644-1 ISO5 Level-ISO9 Level    Package List:  1 * Dust Particle Counter  1 * USB Cable  1 * Tripod  1 * User Manual (English)