Easy installation and water resistance. With soft pad, it is anti-shock. It consist of 128 high visibility RGB LED lights. With the sensor, the power will be out automatically when you are not riding. The speed of 15k/m can be better to display patterns completely. The picture will be changed every 3 seconds. The rechargeable battery can work about 15 hours. You can download pictures from the internet and design your pictures with the USB cable. It is applicable to 26 inches wheel.
It is a wonderful tool for the people who love riding bikes