Operation confirmed. ・There is a small hole in the pre-filter. Please see the photo on the bottom right of the 7th image. ・The humidifier divider on the 15th image has come off, but it can be reattached, so there is no problem with use. Please see the 12th image. ・The humidifier filter has just been replaced, so it can be used as is. ・The part surrounding the filter (see images 16-18) has rust (verdigris) due to limescale. It is said that there is no problem for the human body. ・There is some yellowing due to sun exposure. Overall, I think it's clean. If you have any concerns, I will add photos, so please comment. Please purchase if you understand that this is a used item. Thank you for viewing.