Motion Sensor Valve Light 2 PiecesLED VALVE CAPLighted Valve Cap works while moving thanks to its built-in motion sensor and photocell. Depending on the vehicle speed, a colorful Neon Ring appearance in a circle shape emerges. LED Valve Caps are motion-sensitive, they do not light unnecessarily when your vehicle stops, they will only start to light up when the vehicle moves. After removing the standard valve caps installed on your vehicle, you can easily install LED Valve Caps in their place. It operates with 3 LL1130 type batteries, batteries are included in the package. Product Dimensions 1.5 cm. * 6 cm. Package Contents 2 pieces of motion sensor valve cap