Review on Stay Safe And Stylish On Your Bike With DAWAY LED Wheel Lights - Waterproof And Fun Patterns Included! by Jerry Delic

These work and look exactly like the photos. 1 AAA battery each included. Easy 2 minute install once you realize which way the screw has to go. Keep in mind they are not visible in the day, and to see the full pattern you must be really moving on your bike, otherwise it's less than the full circle pattern. Regardless, it is a great product and my son was thrilled. Mounting hardware is plastic so do not over tighten.