even when it is functioning and night

and one is like spring flow mimics the natural running water stimulates pets to get close and enjoy the peace of drinking.
【24H Circulating Filtration】
The four-layer filter refreshes fluid by its circulating system which follows the required standard keeps pets away from gastrointestinal diseases:improve the taste of the water demineralizing the water to reduce the risk and blocking large particles and large diameter pollutants etc.

Packing  List:
Standard Kit Includes:
1 x Pet Fountain
1 x Faucet
1 x Filter
1 x USB
1 x Silent Pump(Only available for Mute Type)

Warm Notes: The ordinary Water dispenser water pump can only ensure that the machine can discharge water normally and cats can drink water normally without mute function. Those who care should be carefu.