The Alfine DH-S701 is one of the first 1.5 watt (6 volt) hub dynamos with German StVZO approval for LED lamps. It combines filigree appearance, light weight (only 433g in comparison the DH-3N80 weighs 490g) and extremely smooth rotation (40% smoother than DH-3N80) in proven Shimano quality. Furthermore the dynamo has a center lock brake disc mount. So the DH-S701 is the perfect choice to combine efficient power generation, comfort and safety. The overvoltage protector helps not to blow up any light bulbs and guarantees a safe and bright way.