1. A high performance digital stepper motor driver based on 32-bit DSP and pure sine wave subdivision technology.2. Low-noise, Low-vibration and Low temperature rising.3. Voltage 18-50VDC.4. With 8 stalls output current setting, peak current is 4.2A.5. Demension: 118*75*34mm6. Suitable for current range 1.0-4.2A 2 or 4 phase nema23, nema34 Hybrid stepper motor.7. With 15 stalls microstep subdivision setting.8. Automatic half current, self-test, over voltage, under voltage and over current protection.9. Internal optical isolation, highest frequency response 200KHZ.