Andoer V3.0 Expansion Board Board 4*A4988 Driver 4*4401 Stepper Motor Kit with Heatsink USB Cable for 3D Printer

Latest Version 3.0. GRBL 0.8c compatible. (Open source firmware that runs on a Board that turns G-code commands into stepper signals) 4- support. (X, Y, Z , A-Can duplicate X,Y,Z or do a full 4th with custom firmware using pins D12 and D13) 2 x End stops for each (6 in total); Spindle enable and direction; Coolant enable. Uses removable Pololu A4988 compatible stepper drivers. (A4988, DRV8825 and others)