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1. Bicycle warning light mounted on the wheel hub.
2. The device can be mounted to any diameter using the included rubber spacers.
3. The diodes work in three modes: continuous, flashing, pulsating.
4. The back light color is BLUE .. I have the same fixed at my bike, which helps a lot in the safety and visibility for cars coming from the sides of the cyclist. Brand new goods. I recommend
5. Modes: fast, slow, normal
6. side switch to control or turn on / off
7. Waterproof, can work in rainy day. Easy to install and remove.
8. Not only for decoration, but also for warning.