Item Type: Microstep driver_x000D_Model: DM542_x000D_Color: Black_x000D_Power Supply: DC 24-50V (36V recommended)_x000D_Maximum Current: 4.2A_x000D_Output Phase Current: 1.0A-4.2A_x000D_Logic Input Current: 8-20mA (10mA recommended)_x000D_Step Pulse Response Frequency: 0-200KHz_x000D_Operating Temperature: 0 to +50 1Suitable for Nema 17, Nema 23, Nema34 stepper motorand 2?phase mixing stepper motors(outer diameter: 42, 57, 86mm) 2This high subdivision driver is suitable for high subdivision motor. Suitable for 42,57,86 type 2‑phase 4‑phase (4‑wire, 6‑wire, 8‑wire) stepper motor 3PWM current control guarantee the stable operation of motor, suitable for engraving machine, CNC, etc. 4The product is made of high class materials of good quality, which possess stable working performance 5The stepper motor driver have stable structure and high working efficiency, you can use with confidence 1 x Microstep Driver