Feature: 1. High Pulse Frequency: The pulse response frequency of this driver is up to 1MHz, with low heat generation and good stability. 2. Current Adjustable: This motor driver controller is static current adjustable, which is up to 256 subdivision gears adjustable. 3. Photoelectric Isolation: The input signal adopts photoelectric isolation, with strong anti interference ability, provides high working efficiency. 4. High Safety: With automatic over current and over voltage protection, using H bridge bipolar constant current drive, highly safe and reliable. 5. Digital Display: Designed with clear digital display screen, with 4 buttons, the driver controller is easy to configure parameters. Specification: Item Type: Stepper Motor Driver Material: Aluminum Alloy Power Supply Voltage: Minimum 12VDC, typical 36VDC, maximum 48VDC Output Current: Minimum 1.4A, maximum 6A Control Signal Input Current: Minimum 5A, typical 10A, maximum 20A Control Signal Voltage: Minimum 4.5V, typical 5V, maximum 5.5V Pulse Frequency: 0-1000KHz Minimum Width of Step Pulse: 0.5us Minimum Width of Directional Signal: 2us. Package List: 1 x Stepper Motor Driver