Pupular Electric bicycle with EN15194 1) 250W motor 2) Lithium battery,36V/10Ah 3) Alloy frame 4) Japan 6-gear derailleur Popular Electric bicycle with EN15194Motor of electric bicycleRear drive, 250W ... China, high efficiency and durable)Battery of electric bicyclelithium, 36V / 10AhDerailleur of electric bicycleMade-in-Japan, Shimano, outer 6 or 7 gears,precise ...