Unused by cat. I'm selling this after circulating water in it for one day after purchase, but my cat wouldn't use it. It's cordless, easy to clean, and has a simple design. A brand new, unopened filter is included. Thank you for your interest. 3L transparent cat water fountain with automatic water dispensing. - Brand: Latuna - Model Name: WaClear - Capacity: 3L - Features: Automatic water dispensing - Design: Transparent body and ribbed design - Model Name: WaClear - Capacity: 3L - Power: USB power (5V) - Material: ABS resin - Temperature Range: 0～50℃ - Power Consumption: 2W Thank you for looking.