This 16 watt solar waterfall fountain pump kit is designed for outdoor fountains or ponds without the need to run electricity. With the included battery back up, this solar fountain kit will run a couple of additional hours when night falls. The water spray is illuminated with 6 led lights at night. Water rate is adjustable through a variable speed valve. Powered from the sun, this kit is not only enery-saving but also safe to the enviroment. This powerful, compact, solar-powered pump is easy to set up. Just place the solar water pump in your own pond, fountain or birdbath, fill with water, and place the solar panel in the sun then set back and enjoy the relaxing atmosphere that the solar water fountain provides.