Features Specifications:Sell fold lithium electric bike, electric bicycle, e bike, e bicycle  frame: aluminum alloy , foldable battery: lithium iron phosphate batteries (36V × 10Ah) with lock motor: brushless with dental ( 36V × 250W range per charge: 30-50km speed: 28Km / h operation of three speed change method : electric way by manually, aid electric power moving by foot, operate bicycle mechanical  Tires: The United States new tire