Circulating water in the unit creates increased exposure to oxygen, providing fresh-tasting, cool-filtered water and bringing many health benefits. Multi-surface drinking areas allow your cat to drink from the bowl or directly from the dome. The unit's large water capacity (3 L) ensures that continuous fresh water is always available and eliminates the need for daily refilling. It features a safe, energy-efficient, low-voltage system (12 V) that consumes less than 4 watts (or less power than a night light). Suitable for multiple pets, Fresh & Clear Cat Drinking Fountain with Food Bowl is also suitable for puppies and small dogs. The Fountain is easy to clean, maintain, and ideal for a variety of living spaces.