Five Layers Filtration System: Pet water fountain adopt a five layers circulating filtration system, including activated carbon, high-density cotton layer and sponge filter. This can effectively filter impurities, soften the water and extend the life of the pump. This encourages cats to drink more water. Euipped with 2 replacement filter sponges and a protective pad Superb Battery Life: With a built-in 5,000mAh rechargeable battery, the cordless cat fountain provides up to 60 days of use for one charge. Rest assured even during power outages or short trips. It's also super easy to charge thanks to the detachable design of the battery section, which is a self-contained unit that you can take apart to easily recharge Two Modes Flowing Living Water: This water fountain for cats inside has two water flow modes: sensor mode and timing mode. Sensor mode: When pets approach the sensor within a 1.5M, 120 degree wide-angle range. The water pump will automatically add water for 10 seconds. Timing mode：Automatically add water every 15 minutes for 10 seconds. They can meet the different needs of pets. For the health of your pet, please clean the water fountain and replace the filter for every 4 weeks. Ultra Quiet Energy Saving Water Pump: The water pump of the cat water dispenser can operate ultra-quietly (≤30dB), allowing you and your pet to enjoy a quiet sleep. At the same time, it is a low-power pump which is very energy efficient and environmentally friendly. Easy to Install & Clean: The cat water fountain has 2L (68oz), so you don't need to refill it frequently. A cat water fountain filled with water can provide your pet with 7 days of drinking water. The cat water fountain has a detachable design and its parts are removable, which is very convenient for you to replace or clean. Wireless Water Fountains for Cats