first generation:
1. Material: aluminum alloy+ABS plastic
2. Applicable to: bicycles, folding bikes, mountain bikes
3. Ringing tones are crisp and loud, with simple appearance
4. Suitable for handlebar pipe diameter between 21-23 mm, easy to install
5. You can put the tracker in the bell to find the bike at any time
6. Weight: 23 g
7. Size: 36 x 61mm
8. Note: only the bell, not the tracker