Make use of solar energy， no extra power needed， energy-saving and environmentally friendly. The water pump will work only when there is sunlight to provide solar power， and it will stop working when there is no sunlight.Built-in 3 suction cups on the bottom of the water pump， for easy to install on smooth surface by yourself.Solar power submersible water pump kit， suitable for use in your aquarium， fountain pool， garden pond， etc.