The ball is for water basins, garden ponds, swimming pools, water features, parties etc. The solar cell stores the energy from daylight and the plastic ball floats and glows with changing colors in the dark. The light ball made of transparent plastic has a button on the bottom to switch it on with a light mode. Once you press the button, the ball lights up and changes colors. When the color changes, the ball flashes in a rainbow of colors and then continues to shine with alternating colors. This color play repeats itself. Pressing the button again turns the ball off again. The waterproof ball has a hole on the top for a nylon thread to be pulled through and can be hung up like a disco ball. The plastic ball floats on the surface of the water. For party lighting, in the swimming pool.