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When I was decorating my house, I got rid of the heat exchanger (why did I do that..) I'm very sensitive to indoor air quality and fine dust. Even though I ventilated frequently and turned on the air purifier, I had no way of knowing whether the indoor air quality was good or not. But the Royletni LED Wall Clock 5th generation has a fine dust measurement function! Pink - Very bad Yellow - Bad White - Average Blue - Good You can check the air quality or fine dust concentration with the LED wall clock backlight color! Such a great feature💛 There is no flickering and it has a function that automatically lowers the clock brightness to prevent glare when it gets dark, so it's comfortable on your eyes! There's also a patent-pending non-perforated magnetic bracket, so you can install it without drilling into the wall! (We use it on a shelf because it's hard to bury the wires in our house's art wall) I recommend this to those who want to measure air quality and are looking for a clean-designed wall clock that doesn't ruin the interior🕊️ #Fine dust meter #공기질측정기 #데스크테리어 #육아템 #무타공시계 #무타공시계설치 #LED시계설치 #무선LED벽시계 #LED시계 #무선LED벽시계 #신혼선물 #신혼집 #신혼집인테리어 #개업선물 #집들이선물 #오늘장면한컷 #연휴엔푹쉬어요 #이케아추천템 #이케아