Motor Controller:Compact, Powerful, Beautiful Appearance, Suitable for Use in Ordinary Electric Bicycle. Motor Controller System Functions: Linear Speed Control, Brake Power-off,Mute Start,Soft Start,PAS,Cruise,Fault Display, Sensorless, Feedback Break, F/R, CVT, Turbo.System Protection Featuretages:Under-voltage Protection,Overload Protection,Motor Block Protection,Speed Limit,Lose Control ...