Solar Power Crookes Orange Solar Power Radiometer Crookes Energy Spinning Vanes Glass Windmill Gift for Home Desk Decoration.

Product parameters: Height: 140mm Ball diameter: 75mm Base diameter: 65mm The whole is made of glass and the interior is close to vacuum. It can be rotated by light, and it can be rotated in the opposite direction by cold wind Principle: When the light is illuminated, the black leaf surface absorbs heat energy, and the white leaf surface releases heat energy, which can push the four leaf surfaces to rotate. Notice: The product is purely hand-made, or there are minor defects, especially the black coating on the blades in the windmill is easy to fall off, so far there is no good way to solve it, especially during the shipping and vibration process, we can see the blades falling off Lacquer, or black powder in the ball, if you are concerned, please consider carefully before buying, thank you! I am very happy that you can come to our store for shopping. I wish you a one-stop shopping and a happy shopping!

• ✔ When you put the radiometer in the sun, the vanes will keep spinning.
• ✔ Handmade from high-quality glass. Crystal clear, small and exquisite. It needs to be placed on a flat surface to prevent shattering. It is suitable for children over 14 years of age.
• ✔ Put it in the office or the living room is very beautiful.
• ✔ Physics teaching tools - their formation can explain many physics principles. For example, the principle of refraction of light, the principle of air friction, the principle of vacuum propagation of light, the principle of uneven heating generating power, and so on.
• ✔ Giving it as a gift to our family, friends, colleagues, and leaders is perfect. As long as there is light, it can rotate continuously, just like our emotions. As long as we treat them sincerely, friendship can be eternal.