Used a few times. Operation has been confirmed, and there are no issues! The box is a little dirty from storage, but the main unit is clean. Power supply is AC adapter specification. The replacement filter is new, unopened, and contains 4 pieces. This product is for small animals and is designed to absorb floating hair during normal times and shedding seasons. The filter can be vacuumed to remove hair clogs, so you can reuse it until it gets dirty. Thank you for viewing! Please understand that this is a used item and make your purchase based on the photos. Please refrain from purchasing if you are sensitive to the condition, as it has been stored at home. Thank you. *Cancellations after ordering are generally not accepted.