KLS4812S Brushless Motor Sine Controller, 24V-48V, 120A Excellent e-bike controller DESCRIPTION KLS controller should reduce the noise of BLDC motor, especially for hub motor. BLDC motor must be based on 3 Hall sensors. Customers can program the KLS controller by PC software or Android app. You may need a Z-TEK USB to RS232 cable to program the controller if you want to program the controller on an Android Tablet. Main Features: • Frequency of operations: 20 kHz. • Battery standby current: