this driver is a DSP digital dm860h stepper motor driver. The subdivision is increased to 128 subdivision, which is suitable for high subdivision purposes. Applicable to stepping motor: 2-phase and 4-phase (4-wire, 6-wire and 8-wire) of 57 and 86 types 24v-110v DC / 18v-80v AC power supply; H-bridge bipolar constant phase current drive; Eight output currents with current up to 7.2A are optional; 15 subdivision modes that can be subdivided to 128 are optional; High speed photoelectric isolation of input signal; Standard single pulse interface; Offline hold function; Large cooling fan for efficient heat dissipation; Provide energy-saving semi-automatic current locking function; Built in temperature protection and overcurrent protection. Colour:blue Material:Metal Package Contents: 1 * Stepper Motor Driver Only the above package content, other products are not included. Note: Light 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.