1,real-time display air ppllution index; 2,the air tester is test VOC, dust bacteria, stink,weat, etc; 3,display ... desigen:display year, moth, day, time, week;2,the air tester is test VOC, dust bacteria, stink,weat, etc;3,real ... to take a breath or leave the room Our air tester bacteria, dust, stink, sweat, etc. VOC is test the organic ...