The brushless hub Motor,a very economic ,safe motor and low noise ... : 36Vdc/500W/320rpm or 48V/1000W/430rpm· Quiet and Reliable Brushless Motor · Box Dimensions (Front Wheel Kit): 66cm X 66cm X ... 4-6 hours Controller Intelligent brushless.(200w,250w,350w,500w,750,1000w)PAS1:1 intelligent pedal assistant systemThrottle Twist intelligent speed throttle Maximum speed ...