[Wireless Battery Operated Design] Cordless pet water fountain design allows your cats enjoy fresh water freely anywhere. As cats love randomly running from room to room, the cat drinking fountain should not being set up in a fixing place. External wires were eliminated to prevent your furkids chewing them. [304 Stainless Steel & Multi filter System] Made with durable and high quality stainless steel, which is safe and hygienic for pets to drink from, protecting your furry friends from getting feline acne, also making it easy to clean and maintain . The cat water fountain maintains pure water with a 5 layer circulating filtration system, ensuring every sip is fresh and clean. (Only water tray is stainless steel, the water tank is plastic) [Stay Hydrated All Days] 4L water capacity cat water dispenser provide enough water for multiple pets to drink from and you don't have to worry that the water will run out when you're away from home. 210ml backup water on tray still allow your furkid to be well hydrated when out of power. The pet fountain is stable enough that your naughty cats never knock it over