Feature: 1. 3 PHASE STEPPER MOTOR DRIVER: All digital stepper driver, which uses the new digital technology, the use of servo control theory and control algorithm. With excellent performance, excellent stability, low speed mute effect, very low heat. 2. FINE CONTROL: Up to 255 steps to choose, can easily adapt to different transmission shaft ratio; Single and double pulse two signal modes; 16 speed output current selection; 11 lock current percentage selection (0 to 100 percent); 16 lock time options (0.1 to 2 seconds) 3. EASY TO USE: The motor drive device has automatic breakpoint memory, convenient and flexible setting and reading mode, automatic operation function and perfect self detection ability and protection mechanism to ensure safe and smoothly operation. 4. APPLICATION SCENARIOS: The motor drive is particularly suitable for high end applications such as robotics and 3D printers, etc. 5. EASY TO INSTALL: Comes with a small and compact size that you can easily installed the motor drive on the machine and equipment for better performance. Specification: Item Type: 3 Phase Stepping Motor Driver Material: Aluminum Alloy Steps Per Week: 200 to 51000 steps (255 gears) Input Power: AC (40-60) V, DC (50-80) V Output Current(peak): 1.5-5.2A (16 gears) Input Signal: 5V Setting Method: 8 bit dip switch Alarm Output: Yes (optocoupler output) Body Size: Approx. 132 x 85 x 53mm / 5.2 x 3.35 x 2.09in Installation Size: 4 point installation spacing Approx. 140 x 34mm / 5.51 x 1.34in Recommended Motor: 86BYG350A, B, C, D . Package List: 1 x Driver