PETKIT pet water fountain 46oz/1.35L Made of 304 stainless steel, that is safe and durable. The high performance purifying circulation filtration system includes a fur-proof mesh screen, an activated carbon filter and an ion-exchange resin to purify the water. It removes the hair, dirt and food particles and helps provide maximum oxygenation for water. Back-up battery solution (batteries not included) allows a 7-day independent power supply in case of power outage. PETKIT Gen. 2.0 Sleep level silent water pump reduces up to 25% of noise (less than 30dB) and saves energy. Pump is replaceable and very easy to clean. Dual working mode and auto power off pump: Embedded LED lights can easily remind you the working status. The pump will shut off automatically, while the water storage level is to.