I no longer use the Petree automatic water dispenser, so I'm selling it. Two unused filters are for sale. [Automatic Water Dispenser Features] The Petree automatic water dispenser is a wireless pump type designed to provide pets with fresh water at all times. It automatically supplies water, making it convenient and hassle-free. - Filter Type: Air purifier replacement filter - Quantity: Set of 2 - Brand Name: Petree - Product Name: Automatic Water Dispenser - Function: Wireless pump type - Intended Use: For pets Please read my profile (^^)