Unused by my cat. I circulated water in it for two days after purchase, but my cat wouldn't use it, so I'd like to sell it. It's cordless, easy to clean, and has a simple design. I will include the filter, but if you're concerned, you can purchase filters separately on Amazon, etc. Thank you very much. 3L transparent cat water fountain with automatic water dispensing function. - Brand: Latuna - Model Name: WaClear - Capacity: 3L - Features: Automatic water dispensing function - Design: Transparent body and ribbed design Thank you for looking.