Feature: 1. FOR STEPPER MOTOR: This module is a pulse generation module, which provides control signals for the stepper driver and is used with a DC power supply. 2. FREQUENCY AND SIGNAL: Can measure PUL and common cathode terminal frequency, can generate pulse signal, also generate PWM signal, and choose jumper. 3. 3 FREQUENCY SIGNAL: 5.4k-160khz high frequency, 540-16.6khz medium frequency, 80-2.4khz low frequency, with stable and wide signal frequency range. 4. MULTIPE USAGES: This controller board can be used for stepper motor speed adjustment and forward and reverse control, which is widely used. 5. COMPACT SIZE: This motor drive controller board can be used for 42 57 stepper motors, with compact structure, easy installation and disassemble. Specification: Item Type: Stepper Motor Controller Module Power Input: DC 8-24V Signal Frequency: High 5.4k-160khz, medium 540-16.6khz, low 80-2.4khz Package List: 1 x Stepper Motor Control Module Note: Pay attention to the positive and negative poles of the input power supply.