Pet Fountain Cat Water Dispenser - 1.6L Super Quiet Clear Window Flower Automatic Electric Water Bowl with 2 Replacement Filters Animals Blue Carbon Replacement filters catches hair and debris, remove impurities and odor, keep the water fresh and clean Replace filter every 2-4 weeks keep water fresh, provide a healthy environment for your beloved pet Pack of 4 premium activated carbon filters Kindly note: Rinse filter with water thoroughly before use Charcoal filters: Premium Activated Carbon and Cotton