-No battery required, no wiring required. It uses coil magnetic induction technology and magnetic levitation technology to generate electricity when the wheels rotate. Once the threshold is reached enough to light up the LED (usually at a speed of 25 km/h), the LED will light up, and at night, this brilliant light makes your car look very cool and beautiful. -There are four colors available: red, blue, white, and RGB color. -You can choose the corresponding item based on your car. The pattern remains in a vertical position when moving. The inspiration for this feature comes from the RR wheels. -High strength waterproof and dustproof. -The installation is very simple, using a screwdriver to easily remove the original hub center cover, and then attach the new one. -The diameter of the floating center cap needs to be the same as your original one, so please tell us the production year and model of your car or the diameter of your original floating center cap when placing an order. Packaging content: 1 set=4 wheel center covers
