... Size: Middle size.2,Voltage: 48V3,Rated power:450W.4,Maximum Power: 1000W. 5,Maximum Current:22A6,MOSFET: ... (E-ABS optional)6,Limited speed7,1:1 power-assisted8,Prevent bicycle from running when starting9,Driving ... further for power-saving design10,With silent design and without vibration11 ... business cooperation in near future. 48V 450W electric bicycle kit