This product does not need an external power supply, because it will swing with the sun or bright lights. 1: With the principles of optics, under the sun, the light energy will convert into kinetic energy, then the leaves will sway automatically. 2: Green leaves can also relieve your eyes fatigue, which is very suitable for office supplies, home decoration and car interior. 3: If you don't like your product or have any questions, please feel free to contact us, we are ready to help you, we will provide you with a perfect solution. 4: car decorations decorations interior car decorations wedding car decorations birthday car decorations for women interior car decorations cute car decorations for bedroom car decorations exterior car decorations interior men hanging car stickers car stickers for