Material: ABS Size: 6.5*3.4*5.5*2.7cm / 2.54"*1.33"*2.15"*1.05" Color:As shown in the figure 1. Ultra-high-definition, 120dB loud sound effectively warns pedestrians and other vehicles, enhancing cycling safety. 2. Compact and portable, it's suitable for all bicycles and electric bikes, and easy to install without tools. 3. Built-in rechargeable battery offers long-lasting, energy-efficient operation, allowing for multiple days of use on a single charge. 4. Waterproof and dustproof design adapts to all weather conditions, allowing you to ride outdoors without fear of harsh conditions. 5. Stylish design with a variety of colors available, it combines practicality and decorative enhancing your cycling experience and showcasing your personality. Package Includes: Bike Electric Bell *1