Features: 1MULTIPLE PROTECTION FUNCTIONS: Support reverse connection protection, overvoltage protection, overcurrent protection 2FOR AUTOMATION EQUIPMENT: Suitable for any small and medium automation equipment with CNC controller, such as X Y Z table, labeling machine, laser cutting machine, engraving machine, pick and place equipment 3SPEED REGULATION PERFORMANCE: Come with single or double speed regulation function, intelligent automatic switching of onboard speed regulation and external speed regulation during single speed regulation 4ACCELERATION AND DECELERATION: Optimized S shaped acceleration, with immediate stop or deceleration stop function 5INPUT AND OUTPUT: Adopt potentiometer speed regulation, the output can reach 20KHZ pulse frequency, all inputs are isolated by optocouplers, and the input signal is active at low level 6DELAY FUNCTION: The delay time of 0.2S?6S is adjustable before the motor reverses, support VR1 potentiometer adjustment Package included: 1 x Stepper Motor Controller 1 x User Manual