... brake (C.STAR)PAS1:1 intelligent pedal assistant systemSpeed gearsSHIMANO 6 speed gearsController36V intelligent PAS, brushlessDerailleurSHIMANOCharger100V-240V, 50/60Hz smart chargerHandle bar ... Al alloy ZOOM Charge time:4-6 hoursStem Al Alloy PROMAXThrottleTwist intelligent speed controlBrake leverAl Alloy ,cut-off when braking ...