The Sinewave Reactor takes the performance of our Revolution dynamo-powered USB charger and shrinks it into a package that fits above the star-fangled nut in a threadless steerer tube, with a pass through for the 6mm bolt. The only visible part is a custom CNC-milled stem cap holding the USB connector. The cap is only 9.8mm tall and is compatible with 1" and 1 1/8" threadless systems. The Reactor is made in the USA. UNLIMITED POWER FOR: - Cell Phones - GPS - Battery Packs - Rechargeable Headlights - Rechargeable Speakers - Any USB-powered device! FEATURES: - Best in class efficiency - High-Speed Overload Protection - Easy Installation - Shock and vibration toughened - Waterproof - Gold-plated USB connector won't rust or corrode SPECIFICATIONS: - Starts charging at 3.5 MPH (5.5 km/h) - Full charging at 9 MPH (14.4km/h) - Max current: 1 Amp - Also works with DC input up to 52V - Weight: 43 grams (35g Reactor; 8g wire) - Stack height: 9.8mm - Wire length: 36" (91 cm) (contact us if your setup requires a longer wire) - Wire ends: Stripped wire (for hub connection), Reactor pins (for Reactor connection) WARRANTY: - 1 year