256 led programmable bicycle wheel light. This bicycle wheel light monitor system is a smart light specially designed for cyclists which is installed onto the bike hub easily and able to display any imaginable images, cartoons, videos, or flowing characters so cyclists can express their own personality and creativity. It works perfectly on 26" bikes or above as it embraces four light arms which give you enough visual staying time to enjoy your creativity. A programmable bicycle light that turns your bicycle wheel into a colorful screen. Comes with 2 rechargeable 3.7v batteries and a compartment for expanding to a third battery for extra long light time.