Features- Color: As shown.- Material: Alloy electronic components.- Size: 3.8 x 1.7 x 1.7 cm.- Automatically flash light up creating a solid disk of light when your wheels start to move.- When you stop it will switch off to save battery power.- Make your car, motorbike, bike look beautiful.- Increases nighttime and bad weather visibility for safety.- Bring more enjoyment to your drive.Warm Tip: Dear buyer, due to lighting effect, monitor's brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you!Package Including5 x Bicycle wheel lights