... bacteria, stink,weat, etc; 3,display the calendar. Air tester PWJ-5P(display the air pollution index)1,newest calendar desigen:display year ... , moth, day, time, week;2,the air tester is test VOC, dust bacteria, stink,weat, etc;3,real ... window to take a breath or leave the room Our air tester bacteria, dust, stink, sweat, etc. VOC is test the organic ...