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