Made of plastic material, durable and rustproof. Make it have more longer service life. Powered by USB Rechargeable battery, equipped with clip make you fix it more steady and easily, also it can helps improve visibility and safety at night, cycling and other outdoor sports at night more safe. Also it is perfect fit for outdoor activities, hiking, night fishing, camping use. Feature - Color: Red+White. - Material: Plastic. - Size: 7 x 2 x 7cm. - Made by plastic material, durable, light weight and provide more longer service life. - Special fix clip design make you fix it more easily and steady. - Perfect suitable for mountain bike, road bike, foldable bike. - USB rechargeable: Powered by build-in battery, USB rechargeable, all of that make you use it more freely. - Easy to install: Unique strap fix design make you install it more tightly and easily, you can install it at anywhere you need it. - Fit most kind of bike frame, fork, seat post, handlebars, wherever you want. - Warm Tip: Dear buyer, Due to lighting effect, monitor& 39;s brightness, manual measurement and 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