... 1,real-time display air ppllution index; 2,the air tester is test VOC, dust bacteria, stink,weat, etc; ... year, moth, day, time, week;2,the air tester is test VOC, dust bacteria, stink,weat, etc;3 ... to take a breath or leave the room Our air tester bacteria, dust, stink, sweat, etc. VOC is ... gas in the air, mainly tolunene, xylene etc(home decoration,volatile gas from painting), harmful gas is mainly ...