Built-in Micro-Generator: No batteries needed, our training wheels feature an integrated micro-generator for lighting effects, enhancing visibility and safety during bike rides.;High-Quality Materials: Made from premium PU material, ensuring durability and reliability for kids' bikes.;Silent Flashing Training Wheels: Smooth and quiet operation, ideal for developing children's confidence and balance without distracting noise.;Enjoy the Ride: Our non-slip design guarantees safer cycling experiences, allowing children to focus on the joy of riding instead of the fear of slipping.;Single Speed Bikes: Perfectly compatible with single speed bikes, these training wheels provide essential stability for young riders.;Embark on an adventure that is both safe and exciting with our training wheels, designed specifically for single speed bikes. Watch as the built-in micro-generator illuminates the path ahead, adding a magical touch to every bike ride.