1,newest calendar desigen:display year, moth, day, time, week 2,the air tester is test VOC, dust bacteria, stink,weat, etc 1,newest calendar desigen:display year, moth, day, time, week;2,the air tester is test VOC, dust bacteria, stink,weat, etc;3,real-time display air pollution index air pollution index:0-250 0-80(green light) represent excellen air 80-120(yellow light) represent good air 121- ...