This unit can detect the testers for the number, concentration, temperature, humidity and AQI levels at 0.3um, o.5um, 1.0um, 2.5um, 5.0um and 10um particle size dust using the laser scattering principle.   Features: 3.2-inch TFT full color display date, time, pM1.0, PM2.5, PM10 humidity, temperature(℃/℉ switchable), and other data clearly.  Support by newest technology and quality material, having long service time. Easy to operate and having stable performance.  Can store up to 999 groups of data, and has a chart of historical data trend for you to review.  Compact size with a portable storage, easy to operate and to carry around.  Rechargeable lithium battery is included, or can be powered up through 5V USB cable.  This Air Quality Detector is widely used in electronic industry, precision machinery industry, etc. Both suitable for determination of indoor and outdoor public environment.   Specifications: Material: ABS;  Measurement Range of Unit Particle Matter: 0.3um, o.5um, 1.0um, 2.5um, 5.0um, 10um;  Counting Efficiency: 50%at0.3um; 98%at>=0.5um;  Particle Matter Mass Concentration Effective Measured Distance(PM2.5 Standard Value): 0 ~ 500 ug/m3;  Particle Matter Mass Concentration Maximum Measured Distance(PM2.5 Standard Value): ≥1000ug/m3;  Particle Matter Mass Concentration Resolution: 1ug/m3;  Accuracy: ±10%at100~500ug/CMB; ±10ug/CMBat0~100ug/CMB;  Temperature Measurement Range: -20~60℃(-4~140℉);  Temperature Measurement Accuracy: ±1℃;  Temperature Resolution: 0.01℃/℉;  Humidity Measurement Range: 0~100%RH;  Humidity Measurement Accuracy: ±2%RH;  Humidity Resolution: 0.01%RH;  Working Temperature Range: -10~60℃(-14~140℉);  Working Humidity Range: 0~99%RH;  Storage Temperature Range: -40~80℃(-40~176℉);  Working Current: about 180mA;  Charging Time: 3 hours;  Power Supply: 1 * 3.7V, 2200mAh 18650 rechargeable li-ion battery or powered by 5V USB cable;  Record Groups: 999 groups;  Item Size: 140 * 134 * 33mm / 5.51 * 5.28 * 1.30in;  Item Weight: 232g / 818oz;  Package Weight: 874g / 30.83oz;  Package Size: 26.5 * 21.7 * 7.2cm / 10.43 * 8.54 * 2.83in;   Package List: 1 * Detector;  1 * USB Cable;  1 * Stand;  1 * Storage Box;  1 * Manual Manual