Features: 1. Material: Tyre lamp is made of premium stainless steel and plastic material, rustproof, waterproof, impact resistant and durable. 2.Function: Flash tyre lights can increases nighttime and bad weather visibility in all directions, and bring more enjoyment to your drive. 3.Auto Shining: Tyre valve cap light is on when driving and off when parking, consumes no electricity during the day and power saving at night. 4.Wide Application: Wheel lights are suitable for bicycles, automobiles, motorcycles, mountain bikes, road bikes, children's bicycles, etc. 5.Easy Installation: No tools are needed, just a few seconds to install or remove, convenient for using, save your time and energy. Specification: Item Type: Tire Valve Lights Material: Stainless steelandplastic Application: Valve light Battery Type: Button batteryx3 (delivered with built-in battery) Battery Model: AG10 Nominal Battery Capacity: 240mAh