Baiyu Super Bright 32 LED Bike bicycles Wheel Signal Lights Waterproof Colorful 32-pattern Cycling Wheel Spoke Flash Light Lamp-Powered by Battery(Batteries not included) Consists of 32pcs colorful LEDs,Waterproof design, can be used in rainy days Perfect for Safety and Fun - Easy to Install Flash 32kinds of flower patterns which will be changed every few seconds Equipped with light sensor and movement sensor, flash only at night and moving, it will not work and save power when not running You can design the own patterns,DIY, more funny,more special,more attractive,http://www.leadbike.cn/home/page/software.html?l=zh-cn