1. Aluminum Alloy electric City Bike 2. Low noise and no pollution,Light weight,high quality 3.Gained CE,EN15194 certificate Electric system: MotorHigh speed brushless, from 8FUN. -180W-500WBattery36V / 10 Ah -16AH Li-ion ,Lion-polymer. - with electric protection circuit.PAS1:1 pedal assistant system . Speed sensor. - Throttle available.Controller3 speed available LOW - MED - HIGH.DisplayHigh ...