DC 9-42V power supply, compatible with 12-30V input Control signal input voltage: 3.3-24V universal (no external resistor required) Subdivision accuracy: selectable from 1 to 32 microsteps Output current: up to 4.0A H-bridge bipolar constant current drive Upgraded version of TB6600, suitable for 57 and 42 type two-phase hybrid stepper motors with phase current up to 4.0A Features 7 selectable microstep resolutions (1, 2A, 2B, 4, 8, 16, 32) via 6-bit DIP switch Adjustable output current with 8 levels (0.5A, 1.0A, 1.5A, 2.0A, 2.5A, 2.8A, 3.0A, 3.5A) Commonly used in small and medium-sized automation equipment such as engraving machines, marking machines, cutting machines, laser phototypesetters, plotters, CNC machine tools, crystal grinding machines, and automatic assembly systems Optimized for 57 and 42 stepper motors with torque of 1.8N.m or less Equipped with high-speed optocoupler isolation for input signals Includes built-in thermal protection and overcurrent protection Automatic half-current mode to reduce heat generation Motor noise optimization function Note: Product design may vary slightly between batches; minor differences in appearance or color may occur but do not affect performance Color: As shown Material: ABS Package Contents: 1 x Stepper Motor Driver Kit (Other accessories not included) Note: Lighting and display settings may cause slight variations in color representation. Measurement tolerance: +/- 1-3 cm