QW Zone Pet Water Fountain with 3-Liter Capacity An ideal choice for a pet water feeder, for cats and dogs • Large capacity of 3 liters • Elegant three-level design with a wide drinking area that makes it easy for the pet to drink • Water shortage alarm sensor (optional) • Water level indicator • Clean and healthy water circulation through carbon cartridge • Ultra-quiet pump head, safe and reliable Instructions for using the professional water feeder: 1. Remove the feeder cover, then take out the wool filter and clean it. 2. Before first use, rinse the wool filter under running water. Do not use soap or detergents. 3. Insert the wool filter into the water bowl as shown. 4. If any abnormal noise occurs, remove the wire holder and detach the power head, check the impeller and clean the power head, then reassemble the power head in the water bowl. 5. During use, fill the water according to the water level (maximum and minimum). The minimum water level should not be lower than the power head. Low water will cause noise or even damage the power head.