... bacteria, stink,weat, etc 1,newest calendar desigen:display year, moth, day, time, week;2,the ... bacteria, stink,weat, etc;3,real-time display air pollution index air pollution index:0-250 ... high volatile gases4, VOC(volatile organic compound): Quality display light show red will alarm, remind users that ... light) represent high harmful gases5, when harmful gas display light is red, it will alarm, remind ...