Onboard – 64K flash space, 4k ram, 32 I/O pins, Arduino compatible.

3 x Stepper driver connectors with min/max inputs.

Built-in SD card socket for printing from file and buffering large print jobs.

RS485 connection for noise-free communications with extruder / toolhead controllers.

ATX power connector for power. It can also turn the power supply on and off.

Headers to allow existing Sanguinos to plug straight in.

I2C headers for simple hookup of external peripherals.

On/Off switch for instant-kill and simple control of the entire system.