Street FX 1044158 Tire Technix Moto Micro Rainbow Light, (Pack of 2) This product has the motion activated wheel effects The Tire Technix Rainbow LEDs offers a patented effect that makes a rainbow of colors with every turn of the wheel Tire Technix screws onto tire valve stem Tire Technix creates a ring of light when the wheel is moving Wires are connected directly into battery or Street FX power distribution module