Water Level Window & Stainless Steel: Designed with a visible water level window, allowing you to monitor water levels at a glance without opening the lid. Made from 304 stainless steel, this pet fountain is corrosion-resistant and supports high-temperature cleaning, helping maintain fresh drinking water for your pet Quadruple Filtration System: Features a four-stage filtration system, including a cotton layer, activated carbon, and ion exchange resin, to help filter out pet hair, dirt, and food particles while reducing odors.