DescriptionDo you want to make your more amazing and attractive especially at dark? This item is quite a good choice. It is a pair of wheel lights which will light up when the wheel is moving. Made of top-class material, they are durable and practical. Gives you a very cool riding experience.Features- Color: Sky blue. - Material: Plastic. - Size: 6.30 x 1.80 x 1.80cm/2.48 x 0.71 x 0.71 inch.- Shockproof for high quality. The light is made of plastic, and a sensitive chip and a good qulity light. - Auto turn on and turn off, to saving energy. It will light when the bike is moving.- When the lamp stop, bike wheel lights will be off. And the light is very nice. - Whether your bike is mountain bike, road bike or ordinary bike, this stem lights can be perfectly matched. - This bike tire light is life waterproof. Don't need to worry about riding in rainy days.