Features: brand new and high quality The motor consists of a rotating shaft supported by repelling magnets, stabilized by leaning a point against the wall. Place the rotor on the board, hover on the model successfully, and set the model at a 45-degree direction under the light source. Push the rotor lightly and it will run smoothly. It can be rotated under a weak light source. The for stronger the light, the faster the rotation speed of the rotor. The motor is powered by a solar panel mounted on the rotating shaft, and generates current through the insulated wire coil and rotation. Suitable for children's science projects, physics/mechanical learning, classroom demonstration props for teachers, birthday gifts for friends, family, parents, children, etc. It is also a cool high-tech decoration. Package Includes: 1x Solar Magnetic Levitation Model Specifications: Material: ABS+Metal+Acrylic Size: Approx. 135x70mm/5.31x2.75inch Speed: 300-1500 rpm note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.