Air Quality Tester Handheld DM502-O3 incl Ozone Test

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    Multi-function Air quality detector AQI
    PM2.5 Sensor technolology : Laser Scattering
    HCHO/TVOC technolology : Semiconductorsensor-Processor :
    ARM High-speed complex calculations
    Temperature and Humidity sensor, detectTemp,Humidity
    Ozone Sensor
    TFT LCD screen display
    24 hours real timemonitoring.
    Detection range:AQI(0-500)PM2.5 (0-999 ug/M³)
    HCHO(0.001-1.999Mg/M³)
    TVOC(0.001-9.999Mg/M³)
    Power supply: rechargeable Li-battery 1200mah