... 12"-28"700C25KG24v KIT 12"-28"700C7-10KG36v KIT 12"-28"700C7-10KG48v KIT 7-1OKG Electric system MotorFront/rear wheel,light,high speed,brushlessGreat ... market350w-1000w direct motor for USA&Canada market200w for Austrilia&New ZealandBatterya.24v/10Ah polymer li-ionb.36v,7ah Tube Li ... connect controller systemwhole system for display ,throttle,brakepasnew design controller electric bicycle kit