1. Clear, crisp chime with high decibel volume 2. Compact, lightweight, and compact design 3. Built-in high-elasticity spring for a crisp, ringing sound with a gentle tap 4. Made of aluminum alloy with a plastic body, its rainproof, rust-resistant, and durable 5. The knob secures the base for tool-free installation and fits a variety of handlebars 6. Material: Aluminum alloy, plastic 7. Weight: about 24g 8. Size: about 7 x 3.5 x 3cm
