1、Adapted Motor: Our 2 phase stepper motor controller board is suitable for 42, 57, 60mm stepper motor and can do the firm fitting. 2、Multi Protecting: This 2 phase stepper motor controller adopts over current, over voltage, under voltage, phase error, encoder error, position error protection. 3、Efficient and Accurate: This spontaneous pulse two phase stepper motor driver is stable and durable, efficient and accurate. 4、Low Vibration and Noise: The 2 phase stepper motor controller is low vibration, low noise, low temperature rise, high response. 5、Current: This spontaneous pulse two phase stepper motor driver has the current of 2.4 to 7.8A continuously adjustable and space saving. Item Type: Stepper Motor Driver Material: Aluminum Alloy Adapted Motor: For 42, 57, 60mm Stepper Motor Power Supply: DC24-80V Or AC20-70V Current: 2.4-7.8A Continuously Adjustable Features: Stable Performance, Small Size, Space Saving 1 x Stepper Motor Controller