The modular design includes plug in stepper drivers and extruder control electronics on an Arduino MEGA shield for easy service, part replacement, upgrade-ability and expansion. Additionally as long as the main RAMPS board is kept to the top of the stack a number of Arduino expansion boards can be added to the system. In RAMPS 1.4, the resistors and capacitors are now surface mount to fit more passive components. Remember to buy additional Mosfet module to protect your electronics from high current which is used by tour headed.
This set does not have a USB cable.