By using a patented free-falling stream of water, the pet fountain continually aerates your pet's water with healthy oxygen. The fountain comes with charcoal filter to remove bad tastes and odours, adjustable flow control and dishwasher safe components. Multiple streams and circular design allows pets to drink from any angle and is great for multiple pet households. Provides 128 oz (3.7L) of fresh, filtered water with 5 interchangeable spout rings to customise water flow, ideal for households with up to two cats or a small to medium sized dog. Submersible pump for nearly silent operation.