A preconfigured Marlin Firmware is preloaded onto the board.
Stepper Drivers: 4x integrated 1/16th microstep motor drivers
PWM motor current control (no tiny knobs to tweak)
Compact version of RAMBo v1.3L
This is Mini-Rambo v1.3a. The Mini-Rambo board is an all in one 3D printer motherboard. It is a compact version of UltiMachine's RAMBo v1.3L design with the Arduino MEGA and stepper drivers all on one integrated PCB. A great alternative board if you need just the basics!