... .High efficiency 4.Large torque brushless DC Motor for electric bicycle system functions:1. linear speed control,2. brake power- ... ,3. mutte start,4. soft start,5. PAS,6. cruise,7. fault display,8. sensorless,9. sleepRated Voltage:24V---48VPower ... speed control, brake power-off, mutte start, soft start, PAS, cruise, fault display, sensorless, sleepsystem protection features: under-voltage protection, ...