Do 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. Fit for American and English style mouth, not fit for French style. Features - Color: Green. - Material: Plastic. - Size: Approx. 6.3 x 1.8 x 1.8cm/ 2.5 x 0.7 x 0.7 inch (LxWxH). - Powered by three button batteries(included). - Premium material with fine workmanship makes it scratch resistant and waterproof. - Easy to install and remove. Fit for American and English style valves. - Light up when the wheel is rotating. Makes your vehicle super beautiful and attractive. - Suitable for car, bicycle, mountain bike and motorcycle.