... , stink,weat, etc; 3,display the calendar. Sell air tester PWJ-5P1,newest calendar desigen:display year, moth ... stink,weat, etc;3,real-time display air pollution index air pollution index:0-250 0-80(green ... show red will alarm, remind users that air has reached the level of pollution, suggesting users ... is test the organic volatic gas in the air, mainly tolunene, xylene etc(home decoration,volatile ...