【Paired with stepper driver】The stepper motor driver controller can not directly control the Nema17 Nema23 stepper motor. It needs to connect a stepper motor DRIVER(NOT INCLUDED)to control the motor. 【Compatible Stepper motor】Stepper motor controller fit for Nema17/23 Motor. The micro stepping resolution can reach 1/128, DC 5-30V 【13 Setting Functions】The stepper motor controller can adjust the angle, speed, cycle number,motor turns,number of pulses, forward speed, flip speed,direction and delay time of the motor. The micro stepping resolution can reach 1/128, enabling you to control the motor more accurately. The external buttons and knob encoder make it very easy to set the parameters 【9 Working states】 The stepper motor controller has 9 fixed working modes built-in, which can be set to distance/speed/delay/cycle time, so you can choose the working mode faster to meet different scene applications. 【LCD Screen】 The HD LCD display can clearly display speed and cycle time. so you can read the parameters very easily and set various parameters more precisely.The module also has a power failure memory function to prevent your parameters from being lost. Nema17 Nema23 Stepper Motor Driver Controller Integrated Board Forward/Reverse Pulse Speed Angle Control Module PLC Serial Communication 5-30V