Advanced Anti-Lost Technology: This innovative bicycle bell is not just for alerting pedestrians and other cyclists; it's also equipped with a cutting-edge, hidden anti-lost device compatible with for . Keep track of your bicycle's location effortlessly and its security and Stylish: Crafted from premium materials, boasts a sleek, compact design that complements any bicycle model without adding unnecessary bulk. Its robust construction ensures long-lasting performance and reliability, making it an essential accessory for every Easy Installation: is designed for quick and easy installation, allowing you to set it up in minutes without needing any special tools. Its universal fit makes it suitable for almost all types of bicycles Enhanced Safety: With its loud and clear ring, significantly improves your riding safety by making your presence known to others. The added feature of the for compatibility brings a of peace of mind to your cycling adventures Waterproof:Yes Hign-concerned Chemical:None (The product printed words depending on the batch, but this does not affect use) Color:As Shown Material:ABS Package Contents: 1 * Locator bicycle bell Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.