Features： 1、Professional Workmanship: This stepper motor control drive panel is professionally manufactured with exquisite workmanship and high reliability. 2、Potentiometer Adjustment: The angle, time and mode of this stepper motor control panel are all adjusted by potentiometer, which is simple and convenient. 3、Universal Control Driver Panel: This stepper motor control driver panel is compatible with 99% of stepper and servo motor drivers on the market, and can control 2 phase stepper motors within 3A. 4、PCB Material: The stepper motor driver panel uses a finely crafted circuit board for longer life and more responsiveness. 5、Wide Application: This stepper motor control drive panel can be used for CNC laser engraving machine, engraving machine controller, wood engraving machine and mini CNC machine. Specification： Item Type: Stepping Motor Control Board Material: PCB Color: Green Signal Support: Missed trigger, NPN (normally open) Current Range: Within 3A Control Type: Single axes stepper motor controller Delay Range: 0.1-999 seconds Pulse Range: 1-99990 pulses adjustable Speed Range: 0.1-999.9 rpm Adjustment Method: Angle, time, mode are all adjusted by potentiometer Applicable Driver: Compatible with 99% of stepper/servo motor drivers on the market Applicable Motor: 2 phase stepper motors within 3A can be controlled (external drive is required for more than 3A) Package List： 1 x Stepping Motor Control Board