1. Builtin Protection This stepper motor controller brilliantly features against overheating, overcurrent, undervoltage lockout, and input voltage reverse connection. Safety has never been so efficient! 2. Quality Construction Made from topgrade ABS material, the Imported Chip Control ensures sustained reliability and stability of your devices. 3. Fine Control The stepper motor driver utilizes imported special chips to control stepping system precisely. This ensures smooth and accurate outcomes in every use. 4. Excellent Heat Dissipation Equipped with a largearea heat sink, the Micro Step Driver swiftly dissipates heat to prolong the life of the encoder and ensure steady performance. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store