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1. Double sense (sensitive Vibration and Light)
2. Led Flash English words and automatically change;
3. 100% Waterproof, Do not worry about the led light will be damaged when it rains or car wash.
4. Our latest product is the double-side. When you ride, the way people can see words on both sides
5. Power: 3 AG10 button batteries
1 x Bike Wheel Valve
1.Due to the difference between different monitors, the pictures may not reflect the actual color of the item.
2.Due to manual measurement, there may be small deviations.