Function description: built-in control board, several kinds of controller for choice, no HALL controller such as 3A, 7A, 10A, 15A and so on, and a 6A controller with HALL . The motor will start up once it is powered, and then it will run on a setting constant current, on its No HALL mode, even the fan is rotated in counter-clockwise way at high speed, the controller can still start up the motor in normal clockwise rotation way.

Protective functions: over current protection, overheat protection (for control board and motor); blocking protection, lacking phase protection, starting up protection etc.