【Four-layer filtering to clean water quality】The water fountain is equipped with a 4-layer water cleaning system. It is composed of a microporous filter, coconut shell activated carbon, cationic resin and filter wadding. It can filter impurities, remove hair, dirt and food scraps, and provide your pets with clean and healthy drinking water. 【LED Light and Water Level Window】: the blue light is always on when the water dispenser is working normally, to ensure that pets can find the water dispenser at night. The water level observation window can check the amount of water at any time, built-in water level sensor, below the safe water level, flashing light to prevent dry burns. 【2L Large Capacity】: The 2L cat fountain is very suitable for small and medium-sized cats and dogs and has a small floor area. No need to refill water frequently, even if you are on a business trip or traveling, you can ensure your pet has enough water to drink. (at least 3 days, depending on how much water your