Three generations: 1. Waterproof ring design to protect your tracker from rain 2. Suitable for handlebar diameter between 22-25mm, easy to install 3. You can put the tracker in the bell to find the bike at any time 4. Material: pure copper + aluminum alloy + ABS plastic 5. Dimensions: 63 x 70mm 6. Note: Bells only, trackers not included
三代： 1. 防水圈设计，保护你的追踪器不被雨浸湿 2. 适用于22-25mm之间车把管径，安装便捷 3. 可将追踪器放到铃铛里，随时查找自行车 4. 材质：纯铜+铝合金+ABS塑料 5. 尺寸：63 x 70mm 6. 注意：仅铃铛，不包含追踪器在内
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