Only Seller's fellow allow to join.
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It is very good to use in a room of about 5 to 7 pyeong. The price is cheap, and there is an app linkage and there is an automatic mode for the hygrometer. It's good to have all the features
It works well, but it is difficult to link the app.
You have to use it to know, but the design is pretty and the sound is quiet.