The Revolution is an awesome way to get the most out of your dynamo. It is designed to run in parallel with your lighting system to charge any of your USB-rechargable devices and features:

• Best in class efficiency

• High Speed Overload Protection

• Simple Installation

• Shock and vibration toughened

• Waterproof

• Gold-plated USB connector won't rust or corrode

Starts charging at 5.5 km/h Full charging at 14.4km/h Max current: 1 Amp Weight: 37 grams Dimensions: 54mm x 35mm x 14mm