Features: 【Clean Filtration】The cat water fountain is equipped with a filtration system to provide fresh filtered water in the loop. It can remove mud and odor from the water, keeping the water clean and cool. It is recommended to clean the fountain every 7 days. 【Large Capacity 3L】Keeping water is the key to preventing kidney and urinary tract diseases. The 3-liter cat water fountain is perfect for small and medium-sized pets that do not need to add water frequently. Even if you are on a business trip or travel for 3-7 days, the cat fountain can provide enough water .