PM2.5 Checker PM-2.5C CUSTOM

Will catch dust with built-in sensor, the LED (green, yellow, red) will display the standard of PM 2.5 density.To check the concentration of PM 2.5 in homes and on site.Dust Particle Detection Size:Approx. 0.5?EmMeasuring Range (?Eg/[[M3]]):Approx. 0 to 105(9 displayed by classification with approx. 12?Eg/[[M3]] by nine LEDs)Resolution (?Eg/[[M3]]):Approx. 12 (for one LED)Measurement Precision (?Eg/[[M3]]):?} 12 (1 piece LED)Power supply: DC5V built-in battery(power supply from Micro USB via commercially available AC adapter etc.)Charging Time: Approx. 5 hours (when AC adapter with 1A output capacity is used) (AC accessory not included), Continuous Usage Time: Approx. 7 hoursOperating Temperature and Humidity: 0C to 40C, 80% RH or less (with no condensation)W x D x H: 140 x 32 x 90mmConcentration of PM2.5 changes greatly depending on measuring environment surroundings. Therefore, publicly disclosed index value is not guaranteed assurance, for example (vehicle exhaust gas, tobacco smoke, other small dust etc.).