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Contact SupplierTVOC Technology: Semiconductor Sensor • ARM Processor: High-speed complex calculations • CO2 Sensor, Temperature and Humidity sensor, detect temp, hum • Detection range: -- AQI(0-500) -- PM2.5(0-999 ug/M3) -- CO2(0-5000 ppm) -- TVOC(0.001-9.999Mg/M3) • Power Supply???3000mah rechargeable Li-battery included • Display method: 2.8” LCD screen display, 320 x 240 pixels • Detection method for PM: Laser Scattering • Product Weight: 150g