ULTRA QUIET: Powered by an energy-efficient pump, the fountain makes no noise. Waterfall mode is designed to control water flow to minimize dripping noise. UNIQUE FILTRATION SYSTEM: Forget those standard round cotton filters with very limited filtration power. Just one filter will give you and your beloved pet 2 months of clean, fresh and tasty water. We also offer genuine replacement filters. ENERGY SAVING: energy saving and safe from electrical leakage. Convenient design with 2 flow rate settings : The pet water fountain has a fully transparent design, visible water level alert in a transparent container. You can clean and refill water in time, and pour water directly into the cat water fountain. Two different drinking water modes, attract and encourage pets to drink more and be healthier.