Features Adjustable Current: Select the desired current using the convenient dialing switch, providing precise control and optimal performance for your stepper motor. Versatile Micro-Step Settings: Choose from seven adjustable micro-step options, allowing you to customize the motor's movement for your specific application, offering flexibility and precision. Automatic Heat Reduction: The automatic half current feature reduces heat generation, enhancing the durability and longevity of the motor driver while maintaining efficient operation. Effective Heat Dissipation: The large area heat sink efficiently dissipates heat, ensuring stable and reliable performance even during extended use, promoting longevity. High Frequency Interference Resistance: The module exhibits strong resistance to high frequency interference, ensuring consistent and reliable stepper motor control in various operating environments, providing uninterrupted performance. Specification: Input voltage: DC9-40V Input current: 5A(recommended) Output current: 0.5-4A Max. power: 160W Micro-step: 32 micro step Size: Approx. 9.5*7*2.7cm / 3.7*2.7*1inch Weight: 148g Quantity: 1pc Package List: 1 x Stepper Motor Driver Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List: 1 x Stepper Motor Driver Package List 1 x Stepper Motor Driver