SHARP HV-L55-W Stand-type Humidifier Warranty not included. I purchased this used last year, and while there is some discoloration, it works perfectly fine. It has a very high humidifying function. Please only purchase if you understand that this is a used item. The filters are used but are included. You can use it as is upon arrival. If you are concerned about hygiene, please purchase new ones separately. Thank you for looking.