Fangrui Product Details 1. The Current Level Can Be Adjusted To Meet Your Application Needs. 2. Automatic Half-flow Adjustable. 3. Adopt 6n137 High-speed Optical Coupler To High-speed Synchronization. 4. Plate Printing Setting Instructions, It Can Be Operated Without Instructions. 5. Thick And Close-toothed Radiator Is Used For Good Heat Dissipation Working Voltage Dc 10v-35v. It Is Recommended To Use Switching Power Supply Dc 24v Power Supply. Adopt 6n137 High-speed Optical Coupler To High-speed Synchronization. Tb6560ahq New Chip Is Adopted, Which Has Low-voltage Shutdown, Overheating Shutdown And Overcurrent Protection Circuits To Optimal Performance. Rated Maximum Output: 3a, Value 3.5a. Suitable For Two-phase/four-phase/four-wire/six-wire Stepper Motors Within 42, 57 Steps Within 3a, Not Suitable For Stepper Motors Exceeding 3a. Automatic Semi-flow Function. Subdivision: Full Step, Half Step, 1/8 Step, 1/16 Step, Maximum 16 Subdivisions. Colour:as Shown Material:pcb Size:about 50 X 75 X 35mm(width*length*height) Packag