Specifications: The light will be off when the vehicle stops and on when it runs. It will be flashing when you are driving at night. Bring more color to your car/motorcycle/bike. Bring more enjoyment to your driving. Diamond shape design, beautiful and stylish. Installed on the air valve.(Can be used for American and French valves, the adapter is required when installing the French valve, and the product is equipped with a plastic adapter.) Item Name: LED Valve Lights Quantity: 2Pcs Material: Acrylic Powered by: 3 x AG10 Button Cells (Included) Length: 60mm/2.36", Width: 22mm/0.87", Height: 22mm/0.87" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 2 x LED Valve Lights