Features High performance, low noise, good stability, H‑bridge bipolar constant‑phase current subdivision driving control circuit. The driving current is 0.7~4.2A/phase, 8 gears adjustable. When the pulse stops for more than 100ms, the coil current is automatically halved, and the maximum pulse frequency is 100Kpps. Over current, over voltage, under voltage, short circuit protection. Low repair rate and high reliability, convenient and practical. Feature: 1. Adapt to 42~56mm series stepper motors. The highest resolution is 3200 steps/revolution, 5 gears adjustable. Specification: Condition: 100% Brand New Item Type: Stepper Motor Driver Material: Aluminum Alloy + ABS Voltage: DC24~40V Drive Current: 0.7~4.2A/phase, 8 gears adjustable The Highest Resolution: 3200 steps/revolution, five gears adjustable Maximum Pulse Frequency: 100Kpps Purpose: Stepper motor driver, suitable for various automation equipment and instruments in the field of motion control, such as electronic equipment, semiconductor equipment, laser cutting and welding, patching, packaging machinery, engraving machines, marking machines, cutting machines, clothing plotters, CNC machine tools, automated assembly equipment, etc. It is the first choice for users expecting low noise. Size: As Shown in the Picture Package List:1 x Two-Phase Stepper Motor Driver Note:1. Please allow slight error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Package List 1 x Two-Phase Stepper Motor Driver