Fangrui Product Details 1. The Highly Integrated All-in-one Board Solves The Cumbersome And Easy-to-fail Problems Of Ramps1.4 Combination Interface. 2. Optimized Layout And Heat Dissipation Design Make The Performance Of The Whole Board More Stable. 3. It Supports Automatic Leveling Of Proximity Probes, And Customers Can Debug And Add Automatic Leveling By Themselves. 4. Big Usb, The Connection Is More Stable, The Interface Is More Concise, The Connection Is More Convenient, The Work Is More Stable, And The Life Is Longer. 5. Adopt Onboard 4-way A4988 16 Subdivision Stepping Drive Board Motor Drive (two Motor Interfaces For Z Axis). 6. 3 Pwm Dc Outputs (1 High Current, 3 Medium Current, 2 Low Current). 7. Using High-performance And Low-resistance Mos Tube To Drive, The Heat Dissipation Effect Is Better. 8. Adopt St Power Chip, Support 12v-24v Power Input, Solve The Heating Problem Of Ramps Voltage Conversion Chip. 9. It Can Accept 24v Input. Under The Same System Power, The Hot Bed Current Can Be Reduced To 1/4, Which Effective