This a bare, version 1.3a Sanguinololu board. It supports up to 4 axis (X,Y,Z, Extruder). It supports heated bed and hot end outputs. This design allows for easy hand soldering. If you can decently handle a soldering iron, this might be a good option for you. This board will accept the ATmega arduino chip such as the 644p and 1284p, so it is a stand alone unit without the need for a separate Arduino. If soldering isn’t your thing, please check out our fully assembled version.