... mini Controller for e-bike System Functions: Linear Speed Control, Brake Power-off,Mute Start,Soft Start,PAS,Cruise,Fault Display, Sensorless,Sleep. ... System Protection Featuretages:Under-voltage Protection,Overload Protection,Motor Block Protection,Speed Limit,Lose ... Lost Protection,Overheat Protection.A0 90mm*50mm*32mm mini Controller for e-bike