It is the latest research and development of cars, motorcycles, electric cars, bicycles wheel dynamic flashing decorations. There is no need to modify or connect the circuit of the car body itself, just screw it to the valve of the car wheel. This hot wheel can be installed on American cars, motorcycles, electric cars and mountain bikes. Unscrew and remove the insulating paper before use. The battery must be installed with the positive side down (the side with the word is the positive electrode), and the battery should be placed in a black insulating leather case, and do not expose it, otherwise the battery and the lamp shell metal short circuit will cause the battery to discharge and heat, and it will be out of power in a few minutes. No flashing light when parking. When the car moves at night, it can form a bright and complete halo at a lower speed, the color is cool seven colors.   Item Name: Valve Cap Light Material: Light Alloy, Silver Plated Quantity: 2Pcs Line: Intelligent Induction System Power Supply: 3 x AG10 Batteries (Included) Features: Easy to Install, Durable, Safe, Colorful LED Light Size: 3cm x 1cm x 1cm/1.18" x 0.39" x 0.39" (Approx.)   Notes: Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.   Package Includes: 2 x Valve Cap Lights (6 Button Batteries Included)