... 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 ...