Product name:bicycle valve light Product size about : 8.5cm or 3.34in Battery life: 55-150 hours(riding time) Battery model: ag10 Product color: As shown in the figure Product material:pc product features: 1. Universal compatibility: Our bike valve light is compatible with three valve types - EV, AV, and FV. This means it can be used on a variety of bikes, including mountain bikes, road bikes, and even motorcycles. 2. Easy installation: Installing our valve light is a breeze. Simply attach it to the valve stem and secure it in place. No tools are required, making it a quick and hassle-free process. 3. Attention to FV valve users: For those using FV valves, a converter is needed to connect the valve light. This converter allows for seamless integration and ensures that FV valve users can enjoy the benefits of our valve light without any inconvenience. 4. Versatile usage: Not limited to just bicycles, our valve light can also be used on car and motorcycle wheels. This makes it a versatile accessory for any vehicle, providing enhanced visibility and safety. 5. Easy battery replacement: When it comes time to replace the batteries, our valve light makes it simple. With a user-friendly design, you can easily access and replace the batteries, ensuring that your valve light is always ready to illuminate your ride. Precautions: 1. As we all know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can feel free to contact mewe will give you some suggestion, but it is for you reference only. Shipment includes: 2 pc bicycle valve light