ProdecoTech v4.0 SCORPION 33V 250W 9 Speed 9.3Ah Li Ion Electric Bicycle, Matte Black, 26-Inch/One Size Volcanic 7000 Alloy Frame Rear Friction 33V 250 W Torque Continental Tires 20"X 1.75" Speed 25kmh; Distance per hour 20-35 miles Cadence Sensor Pedelec