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1. Bright and clear sound: made of high quality aluminum alloy, the highest volume is 75dB after laboratory test. Maybe you have no idea about this volume — seems someone is talking loudly in your ear, so it is a good reminder to the people around you, so that you can ride without worry.
2. Spring collision: external high strength spring, easy to use without deformation (ring adjustable)
3. Suitable for folding bike/mountain bike/road bike
4-Easy to install – fits for re handlebar tube outer diameter with 21mm-23mm (0.83inch – 0.90inch)
5. Perfect after-sales service: 6 months warranty replacement,please contact us if you have any questions about the product or service.