We took our popular Mega2560 Breakout board and added another 64 inputs! This gives you a whopping amount of I/O in such a small package. Just imagine what you can build with 64 extra inputs! We made this work by adding 4 Multiplexers on the board, no messy wires, no soldering headaches. Perfect!! Pluggable headers just to make it even easier to build your dream cockpit.