-Material:ABS

-Product Size：155*87*35MM
-2.8” LCD screen display, 320 x 240 pixels
-PM2.5 Sensor technolology : Laser Scattering

-O3(ozone)  technolology :Electrochemistry sensor 

-TVOC technolology:   Semiconductor  sensor 

-Processor : ARM ,High-speed complex calculations

-Temperature and Humidity sensor, detect Temp,Hum.
-Detection range: 
 PM2.5 ( 0-999 ug/M3 ) 
 O3(0.00-50.00 ppm)
TVOC(0.001-9.999Mg/M3)
-Power supply：rechargeable Li-battery 1200mah 
-Included:Main Unit+manual+charging cable

Advantage : 
-Integrated detection with O3/PM2.5/TVOC/Temperature/Humidity
-Built-in auto calibration algorithm to enhance sensibility and save 
-Exceeding Alarming with auto detection and auto measuring
-if people do not like alarm sound ,people can turn it off by pressing the power button 2 times 
-User-friendly and easy operation 

DM502-O3 package details： 
Product N.W.：150g
Product G.W.：300g 
Package Dimension：19.5*12.5*4cm 
CTN Dimension：58.5*21.0*40.0cm
CTN Weight:15.4Kg
46sets/CTN