1pc DC 9‑40V 160W 0.5‑4A Stepper Motor Driver Step Controller Module Board 32 Microstep Description: This Stepper Motor Driver provides over heat, over current and short circuit protection. Seven kind micro steps can be adjusted. Large area heat sink can effectively dissipate heat. Features: The current is selected by the dialing switch. Seven kind of micro-steps are adjustable. Automatic half current reduces heat. Large area heat sink can effectively dissipate heat. Strong resistance to high frequency interference. Input voltage anti-reverse protection. Over heat, over current and short circuit protection. Specification: Input voltage: DC9-40V Input current: 5A(recommended) Output current: 0.5-4A Maximum 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