Turn your bike into a light show! Monkey Light Pro is a wheel display system that runs on a built-in, USB rechargeable battery. Start pedaling and when you hit between 10 mph and 40 mph, you’ll have a 70 pixel diameter, full color display within your bike wheel. It’s pre-loaded with custom artwork or you can download your own images and animations. The battery run time is 3-8 hours at full brightness or up to 48 hours at reduced brightness. A super-cool, fun way to stay visible at night.