Compatible for Nema 17, Nema 23 and Nema34 Stepper Motor,2-phase hybrid stepper motors(Outer diameter: 42,57,86mm). Compatible for drive Two-phase stepping motor dynamic voltage 20V to 50V, the maximum drive current is less than 5.6A. Driver 42/57 Stepper Motor has 24V-50V DC power supply, 8 level adjustable output current 1.0A-5.6A Stepper Motor apply in dispensing machine, woodworking machine, welding machine, screw machine, winding machine, placement machine, packaging machine, LED, electronic equipment, etc CNC Digital Stepper Driver DM556 Stepper Motor Controller 2-Phase Stepper Motor Driver 20-50V DC Max 5.6A 128 Subdivision Model: DM556 Application: 42/57 stepper motor Input voltage: DC 24-50V Output current: 1.0-5.6A, 8 level adjustable, 0.5A resolution Drive method: Bipolar constant current PWM drive Pulse response frequency: 200kHz(Max) Insulation resistance:Greater than 500M Insulation strength: 500V/min Dimensions: 118x75.5x34mm / 4.6x3.0x1.3in Weight: Approx. 270g / 9.5oz Colour:Black Material:plastic Package Contents: 4 x DM556 Steeper Motor Driver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.