Featured with 30 patterns with green, orange, blue and red color, our bike wheel lights can enhance your safety while cycling at night as well as make you stand out with this fantastic and coolest flashing light! No other operation, just insert the battery and it will flash when it\'s simultaneously at action and in darkness. Then auto turn off 30 seconds after stop riding, more energy saving. Suitable for ordinary bicycles, foldable bike, and any other 20in and above bikes.
