Sharp Humidifying Air Purifier KC-F40-W, made in 2016. It hasn't been used for about 4 years and has been stored in a closet. Operation has been confirmed. There is yellowing on the air outlet and other parts (not from tobacco). Please check the photos. There is no instruction manual. Please refrain from purchasing if you are looking for a perfect item or are very sensitive, as this is a used item stored at home. Thank you.