Features: 1.Signal Generator Module: This module is a pulse generation module that provides control signals to a stepper driver. 2.Control Motor: In order to control a stepper motor, the user must have a driver. This module can perform suggested speed regulation, control forward and reverse rotation, etc. 3.3 Types of Signals: The controller has high 5.4k?160khz, middle 540?16.6khz and low 80?2.4khz total 3 types of low frequency signals available for jumper selection. 4.Multifunction: This controller module can generate pulse signal, also can generate PWM signal, or can select jumper, various functions. 5.Easy to Use: This simple controller can be used with a stepper motor and DC power supply to form a simple control platform. specification:Item Type: Adjustable Stepper Motor Controller Material: PCB Measurement Frequency: PUL and Common Cathode PackageList:1 x Adjustable Stepper Motor Controller NoteDifferent stepper drivers may be marked with different names EN = ENA = FREE enabled PUL = PULS = CLK pulse DIR = CW = CWW direction