Homdox Automatic Electric 3L Pet Water Fountain Dog Cat Drinking Bowl With US Plug Material: Activated Carbon, Colth and Plastic Color: White Size: 6 x 2 x 4.5cm/2.3 x 0.8 x 1.8inch (L x W x H) Quantity: 4PCS Activated Carbon Filter, 1PCS Foam Filter Replace charcoal filter erery two weeks.