350w 48v electric bike

E-ALFA 48V/9Ah Lithhium Battery Electric Bicycle 350W High-Speed Brushiess Motor Details: Main Specification Frame: Alloy Non-folded Frame Fork: Steel Hendlebar and Stem: Aluminum/Steel Tyre: 24” KENDA Rim: Double Wall Aluminum Derailleur: SHIMANO speed Front: Drum brake Rear: Drum brake Chain Wheel & Crank: Alloy/Steel Saddle: Cozy saddie Seat Post: Alloy/Steel Battery: 36V 9AH Lithhium Battery Motor: 350W High-speed brushiess rear Motor Controller: Intelligent controller