The 5pin Hall interface of the board is used to connect the Hall signal of the motor. By default, the module is a bare board. If you drive a motor with a current of less than 5A, you don't need to force heat dissipation, but you only need to normal ventilation. If the driving current exceeds 5A, you must force heat dissipation. The heat sink provided by our company can last for 20A. The length and width of module is 78x57mm, the thickness of the plate is 1.6mm, and the working voltage is 6-80V, which supports the anti-reverse connection protection and not damage the module due to the reverse connection of the power cord. On-board LED indicator is used for standby, working, error and other states. On-board potentiometer (0.5-5V), PWM speed regulating interface (frequency 1-20KHz), duty cycle 10-100%., Weight: 0.14770971554 Pounds, Manufacturer: NONDK